Tag: Homework Help

If you love airplanes, try out some of these paper creations in Building Vehicles That Fly. These paper engineering projects will help you learn the science behind how planes are designed and built. If you understand how the forces of aerodynamics work, you can make a paper airplane that flies really far! In several of the books listed below the directions are really clear with color photographs to help you make the folds correctly. Start out with a couple easy ones and then try something more challenging.

What You Need

• Paper
• Pencil
• Ruler
• Paper Clips

Do an experiment with three paper airplanes folding the exact same way with the exact same size of paper. Fly all three planes and measure how far they go. What happens if you add one paperclip to each? What happens of you add 2? Or 3? Record your results.

Websites, Printables & Activities

• NASA: How to Make a Dart Airplane
• NASA: How to Build a Paper Jet Model
• NASA: How to Make a Blunt Nose Airplane
• NASA: Four Forces on an Airplane
• NASA: What Is Aerodynamics?
• Printable: PBS Kids Fetch Hang Time
• Exploratorium Try This! Paper Airplanes
• The Children’s Museum of Indianapolis: Airplane Models & Toys

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about paper airplanes at any of our locations, or check out paper airplane e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Sometimes when atoms come together to form a molecule, one end of the molecule has a positive charge and one end of the molecule has a negative charge. When this happens the molecule is called a polar molecule. Molecules that do not have two different electrical poles are called non-polar molecules. For today’s demonstration you will make a lava bottle to observe polar and non-polar molecules.

This experiment will show you how polar molecules and non-polar molecules behave when added together. If two kinds of molecules are added together that are both polar molecules, they will mix. They are miscible. Miscible means that the two things can mix together. If two non-polar molecules are added together they will also mix and are miscible. However, if a non-polar molecule and a polar molecule are added together, they will NOT mix together. This is called imiscible. Imiscible means that the two kinds of molecules CANNOT mix together.

What You Need

• Plastic Bottle
• Water
• Vegetable Oil
• Food coloring
• Measuring Cups
• Alka Seltzer

Instructions to Make a Lava Bottle

Fill the bottle about 3/4 of the way up with vegetable oil. Fill the bottle the rest of the way up with water. Now add some drops of food coloring. Close the cap on the bottle and shake it up. What happens?

Break the alka seltzer tablet in half. Open the bottle and drop in one half. What happens? Once the bubbles settle down drop in the other half. What happens again?

Water is a polar molecule. Vegetable oil is a non-polar molecule. These two substances do not mix together, they are imiscible (they will not mix together). That’s why you see the blobs of water bobbing around in the oil. Food coloring is a polar molecule so it WILL mix with the water. The water and the food coloring are both polar molecules and will mix together. That’s why the water blobs turn the color of the food coloring and the oil does not.

The alka seltzer just makes the lava bottle more fun because it makes the colorful water blobs move without shaking the bottle. The alka seltzer tablets dissolve in the the water and make carbon dioxide gas (like we saw vinegar and baking soda do in the Exploding Ziploc Experiment. The carbon dioxide gas bubbles attach to the colorful water blobs and make them float to the top of the bottle. When the gas bubbles pop there is no gas bubble to hold up the water blob, so it slowly floats back down to the bottom of the bottle.

Websites, Activities & Printables

• National Geographic for Kids: Groovy Lava Lamp
• Steve Spangler Science: Make Your Own Lava Lamp
• Science Bob: Blobs in a Bottle
• Exploratorium: Glitter Globe
• Glasgow Sciece Center: Lava Lamp
• Science Fun for Everyone: Lava Lamp

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Sir Isaac Newton, an English scientist born in 1642, discovered three important principles of physics that describe how things move. Consequently, the principles bear his name, Newton’s First, Second, and Third Laws of Motion. Today’s experiment demonstrates Newton’s Third Law of Motion. It says that for every action there is an equal and opposite re-action. Basically, if an object is pushed, that object will push back in the opposite direction, equally hard.

Websites, Activities & Printables

• Groovy Lab in a Box: 4 Groovy Ways to Teach Newton’s Third Law
• Lego Challenge: Newton’s Third Law
• NASA: Newton’s Third Law of Motion
• IndyPL Blog: Newton’s First Law of Motion
• IndyPL Blog: Newton’s Second Law of Motion

You can ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Sir Isaac Newton at any of our locations, or check out Sir Isaac Newton e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Crystals are made when a substance has atoms or molecules that form in a very organized, repeating, 3D pattern. When we think of crystals we often think of some well-known gemstones like diamonds or rubies. But there are some very common crystals too like sugar, ice, snowflakes, and salt.

Learn more about the naturally occurring crystal formation of snow and ice by reading Curious About Snow. Find out the science behind how snow crystals form, the stories of record setting snowstorms, and an introduction to the life and work of photographer Wilson Bentley. Bentley made it his life’s work to study and photograph snowflakes. It is because of Wilson Bentley that we know no two snowflakes are alike!

Enjoy Bentley’s fascinating biography, Snowflake Bentley. You know what is really amazing about him? He made his discoveries in the 1890s! He invented and used a special device that combined a microscope with a camera to capture his microscopic pictures. The book includes some of Bentley’s actual snow crystal photographs.

You can make a scientific observation yourself or do a crystal experiment at home by growing borax crystals. Borax is a laundry detergent booster. You can find borax in the laundry room at home or in the laundry detergent section at the grocery store.

What You Need to Grow Borax Crystals at Home

Try this experiment at home! You will need:

• Glass Jar
• Pencil or Pen
• String
• Pipe Cleaner
• Borax
• Pitcher
• Measuring Cup
• Tablespoon
• Hot Tap Water
• Piece of Yarn or Cotton String, about 6 inches long

Instructions for Growing Borax Crystals

Fill a pitcher with 3 cups hot tap water. (Not so hot that you can’t touch it!) Add 3 tablespoons of Borax for each cup of water. We used 3 cups of hot tap water and 9 tablespoons of Borax. A mason jar was a great container for this. Stir the mixture.

If all of the Borax dissolves, add a little more Borax and stir. Add Borax until the water can’t dissolve it anymore – the mixture is saturated. That means the water is holding as much of the Borax as it can. In fact, this solution is supersaturated, that means the water is holding even more Borax than it normally would because the water has been heated. Now pour this supersaturated solution in the glass jar.

Make a shape out of the pipe cleaners and tie one end of the string to it. We made a snowflake shape out of pipe cleaners to see if we could make a snowflake crystal. Tie the other end of the string to the middle of the pen. Hang the pipe cleaner shape down in the jar with the pen across the top of the jar to keep it from touching the bottom of the jar. Watch what happens in the jar over the next few weeks.

Here is what our crystals looked like after growing on the pipe cleaner snowflake for about 2 weeks. The secret to growing borax crystals is having a supersaturated solution.

Science Experiment Idea

Grow three different borax crystal snowflakes. You need three glass jars that are exactly alike. Fill one with cold tap water and one with hot tap water. Get an adult to help you fill the last jar with boiling water. Now add Borax a little a time to each jar until the Borax will not dissolve anymore. The warmer the water, the more Borax will dissolve in the water. That’s because heating the water helps it become supersaturated. Now add a pipe cleaner snowflake to each jar and compare the crystals that grow over the next couple of weeks. Which jar has the most crystals? Which jar has the largest crystals?

Websites, Activities & Printables

• San Diego Natural History Museum: All That Glitters – the Splendor & Science of Gems and Minerals
• Exploratorium: The Science of Rock Candy
• Printable: Homemade Rock Crystal Candy
• Steve Spangler Science: Borax Crystal Ornaments
• Video: Sick Science – Borax Crystal Star

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about crystals at any of our locations, or check out e-books and audiobooks about crystals from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

A molecule is a group of atoms bonded together. Density is how close together the molecules of a substance are or how much mass a substance has in a given space. Buoyancy and density are related. Density affects how much an object might float, or be buoyant, or sink.

For example, if you have one cup of jelly beans and one cup of marshmallows, the jelly beans have more mass because there is more “stuff” compacted into the cup. The marshmallows have less mass because the molecules of marshmallows are NOT close together. Marshmallows are mostly air.

If you put each of those cups in a microwave to melt the jelly beans and the marshmallows, the sugar and water molecules that make up the jelly beans would almost fill the cup to the top. The sugar and water molecules that makes up the marshmallows would only fill the cup a little bit because marshmallows have less mass, they are mostly made of air. Materials with more density weigh more. A cup of jelly beans weighs more than a cup of marshmallows.

For an object to be buoyant, or float, it must have less density that what it is floating in, or, it has to have something attached to it that helps it float – like you with a life jacket on. You can make some interesting observations about density and buoyancy.

What You Need

• Drinking Glass
• Clear Soda
• Water
• Ten Raisins

Instructions

Fill one clear glass up with water and drop in five raisins. Fill another clear glass up with clear soda like sprite or 7up. Drop in five raisins. What happens when you drop the raisins in? What a few minutes – now what is happening to the raisins in each glass? Can you guess why the raisins are behaving differently?

Raisins are heavier than the water in the drinking glass. The raisins are also heavier than the soda in the drinking glass. At first, both sets of raisins sink to the bottom of the glass, they don’t float.

But the soda has little air bubbles in it – the carbonation. When there are enough of these little carbonated balloons (the bubbles) stuck to the raisins the bubbles lift the raisins to the surface making the raisin float. The bubbles are like little temporary life jackets! When the bubbles pop and the gas inside them escapes into the air…the raisins don’t have anything to help them float anymore and they sink to the bottom of the glass again.

Science Experiment Idea

Try putting other small objects in soda to see if the bubbles will attach to them and help them float to the surface of the soda. Try a penny, a toothpick, a peanut, or a skittle. Can you find something that the bubbles will float to the surface like the raisin?

Websites, Activities & Printables

• Science Bob: The Magic Ketchup Experiment
• Kids Science Challenge: That Sinking Feeling
• ZOOM: Density and Buoyancy Mixing Hot and Cold Water
• NOVA Online: Buoyancy Basics
• Printable: PBS Kids Fetch Float My Boat Experiment

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Matter can be a solid, a liquid, or a gas. Matter changes when you heat or cool it. When you heat a substance, its molecules move faster. As the water in a pot on the stove gets hotter, its molecules begin to move until the water is boiling. When you heat gases, the same thing happens. You can do a dramatic experiment with a bar of ivory soap to observe how heat can change matter.

What You Need

• Bar of Soap that Floats (Ivory Soap does!)
• Bowl of Water
• Paper Plate
• Microwave

Instructions

Break or cut the bar of soap into four pieces. Put the pieces on a paper plate and microwave for 1 minute. Watch the ivory soap through the microwave window.

As the soap molecules begin to heat up, the air bubbles move quickly away from each other, or expand. This is called If you roast a marshmallow, the same thing happens.

Science Experiment Idea

Choose different kinds of soap to see what will happen when they are heated up for one minute in the microwave. Heat each bar of soap up on the same kind of plate. Heat each bar for the same amount of time. The variable in this experiment is the soap, everything else has to be the same. Do the bars of soap each react the same way when they are heated up in the microwave? Why do you think so? For one soap, choose a brand that has air bubbles whipped into it, like Ivory soap. To test a bar of soap to see if it has air bubbles in it, float it in a bowl of water. A bar of soap will float if it has air bubble whipped into it.

Websites, Activities & Printables

• Encyclopedia Britannica Kids: Heated Air Expands
• BBC Bitesize: Solids, Liquids and Gases
• Chem4Kids: Looking for a Gas
• Steve Spangler Science: Balloon Expansion
• Curiodyssey: How to Blow Up a Balloon with Hot Air
• Kids Corner Science: Expanding Marshmallows

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Have you ever put a coin in one of those wishing wells that is shaped like a giant funnel? The coin rolls around and around the sides of the funnel in smaller and smaller circles until it goes down the hole in the middle of the well. That coin is demonstrating centripetal force. Centripetal force is the force that pulls a thing toward the center of rotation….like the little whirlpool that forms when you drain the bathtub or like the Zinga Water Slide at Holiday World! Why IS that water slide called Zinga? Because in Swahili Zinga means “to move in a circular motion”. Lots of amusement park rides work because of the laws of physics. You can do the activity hex nut balloon to demonstrate centripetal force.

What You Need

• Balloon
• Hex Nut

Blow up a large balloon. Before you close the balloon, put a hex nut in it and then tie the end of the balloon closed. Hold the balloon between your hands and move it in a circular motion until the hex nut starts to roll around the inside of the balloon. Now stop moving the balloon and watch what happens to the hex nut. What you are seeing is centripetal force. The hex nut is on a circular path inside the balloon. Things that are moving in a curved or circular motion will slowly move toward the center of the circle, in this case, the bottom of the balloon. What sound does the hex nut make? How about a penny? A marble? Try them all and see how they behave the same or differently.

Websites, Activities & Printables

• Video: Steve Spangler Science – Screaming Balloons
• PBS Kids: Fetch Whaohler Coaster
• Funderstanding: Roller Coaster Demonstration
• Roller Coaster Physics: Design a Roller Coaster
• Griffin Museum of Science and Industry: Science at Home Roller Coaster

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

If you mix one substance with another substance you get a mixture. Lemonade would be an example. Or cookie dough! Pen ink is also a mixture. It has more than one substance in it. In this experiment you will see that it is possible to UNmix a mixture too. This is called chromatography. Chromatography is separating the parts of a mixture so that you can see each one by itself. Try this activity to observe black ink chromatography.

Watch the video below to see a demonstration of chromatography using some simple items you can find at home. Then try it yourself with paper towels and markers. In this experiment you will find out something surprising about what mixes together to make black ink!

What You Need

What You Need:

• Paper Towel or Coffee Filter
• Bowl
• Water
• Several different kinds of black markers

Instructions

Cut strips from the paper towel about 1 inch wide – one for each type of marker. Scribble across the bottom of one of the paper towel strips with each kind of marker. Scribble about one inch from one end of the paper towel strip. Tape the OTHER end of the strip to the maker you used to scribble on that strip. That will help you remember which marker goes with each paper towel strip.

Now hang the paper towel strips above the bowl of water so that only a little bit of the scribble end is in the water. Do not submerge the pen scribbles! Check on the paper towels in an hour. What has happened to the pen marks?

What you see happening on the paper towel strips is chromatography. The color of the ink in markers is made by mixing different pigments together. A pigment is a substance that makes color, like ink or dye. To make black, several pigments are mixed together. When the end of the paper towel strip is submerged in water the water soaks up through the paper towel. When the water passes through the black ink it takes the pigment colors with it. Some pigments dissolve in water easier and are pulled with the water farther up the paper. This is called chromatography – separating the parts of a mixture so that you can see them one at a time. Black ink actually looks like a rainbow!

Try a Black Ink Chromatography Science Experiment

Now set up an experiment using different kinds of paper to see what happens. Try a paper towel, a tissue, a square of toilet paper, and a piece of printer paper. Cut them all the same size. How does the ink act the same? What do you see that is different?

Or, set up an experiment with equally sized pieces of paper towels again, but test different colors of markers. Try black, purple, blue, green, and red. Can you predict what colors make up purple ink?

Websites, Activities & Printables

• Exploratorium: Chromatography Activity Sheet
• ZOOM: Paper Towel Chromatography
• Children’s Museum of Sonoma County: Chromatography Color Experiment for Kids
• PBS Kids Science Video Coffee Filter Chromatography
• Amazeum Chromatography Color Detective Printable Activity Guide
• Science Sparks: Paper Chromatography Experiment
• American Chemical Society Kids Zone: Investigate with Chromatography (.pdf)

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

In today’s experiment you will be able to watch a chemical reaction. In this experiment vinegar (a substance) and baking soda (a substance) will mix together. When mixed together the molecules of the two substances will re-arrange, or change, to make new substances. Read on to find out how this chemical reaction results in an exploding ziploc!

Vinegar has acetic acid in it. The chemical name for baking soda is sodium bicarbonate. When you mix the two together you get sodium acetate and water. You also get carbon dioxide, which is a gas. The bag puffs up because carbon dioxide is a gas and takes up a lot of space. Eventually the bag isn’t big enough to hold all that carbon dioxide gas so it becomes an exploding ziploc!

You Will Need

Try it at Home! You Will Need:

• Measuring Cups and Spoons
• Baking soda
• Vinegar
• Snack size ziploc bag
• Quart size ziploc bag

Measure one tablespoon of baking soda into a quart size ziploc bag. Measure 1/2 cup of vinegar into the snack size ziploc bag and zip the bag closed. Put the snack size ziploc bag full of vinegar into the quart size ziploc bag with the baking soda in it. Get as much air as possible out of the quart size bag before zipping it closed. Go outside! Stand in the middle of your yard. Grip the snack size ziploc bag from the outside of the quart size bag and pull it open. As soon as the vinegar starts to mix with the baking soda drop the bags into the grass and watch what happens.

If your bag inflates, but does not explode, try increasing the amount of baking soda and vinegar. If you do this, be sure to drop the bag quickly and take several steps away after you mix the two substances together – when the bag explodes it splashes vinegar everywhere…which does not feel good in your eyes. See the dog’s nose and eyes? Too close! And…it goes without saying to do this OUTSIDE. To investigate chemical reactions further – try some more experiments at home!

Websites, Activities & Printables

• Exploratorium: Bubble Bomb
• Science Bob: The Exploding Lunch Bag
• Chem4Kids: Chemical Reactions
• BBC Bitesize: Chemical Reactions
• Science Fun for Everyone: Explode a Bag
• Video: Exploding Lunch Bag
• Video: The Children’s Museum of Indianapolis – Real Science Exploding Baggies Experiment

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about chemistry at any of our locations, or check out chemistry e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Sir Isaac Newton was an English scientist. He was born in 1642 and died in 1727. This was around the time of the early colonization of North America. He lived just before the American Revolution. Newton is best known for three important principles of physics that describe how things move. Consequently, the principles are referred to today by his name – Newton’s First, Second and Third Law of Motion. Newton’s Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object).

Riding your bicycle is a good example of this law of motion at work. Your bicycle is the mass. Your leg muscles pushing pushing on the pedals of your bicycle is the force. When you push on the pedals, your bicycle accelerates. You are increasing the speed of the bicycle by applying force to the pedals.

Newton’s Second Law also says that the greater the mass of the object being accelerated, the greater the amount of force needed to accelerate the object. Say you have two identical bicycles that each have a basket. One bicycle has an empty basket. One bicycle has a basket full of bricks. If you try to ride each bicycle and you push on the pedals with the exact same strength, you will be able to accelerate the bike with the empty basket MORE than the bike with the basket full of bricks. The bricks add mass to the second bicycle. With bricks in the basket, you would have to apply more force to the pedals to make the bicycle with bricks in the basket move.

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Experiments:

• Perkins School for the Blind: Newton’s Second Law of Motion
• Sciencing: Second Law of Motion Experiments
• 4-H: Newton’s Speedway: Acceleration, Mass, and Force

Websites, Activities & Printables:

• Scholastic StudyJams: Newton’s Second law of Motion
• NASA Classroom Connections: Newton’s Second Law of Motion
• NASA: Newton’s Second Law of Motion
• Printable: NASA STEMonstrations Newton’s Second Law
• Khan Academy: What Is Newton’s Second Law?
• IndyPL Blog: Newton’s First Law of Motion
• IndyPL Blog: Newton’s Third Law of Motion

You can ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Sir Isaac Newton at any of our locations, or check out Sir Isaac Newton e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Sir Isaac Newton is famous for figuring out certain rules that apply to things on earth. One of his rules is that matter can take three forms: solid, liquid and gas. Liquids flow and take the shape of the container they are in. You can see that happen when you pour a glass of water. This activity using borax and cornstarch goo will show you something interesting.

Usually matter turns into a liquid when it is heated. When liquid is heated it “gets runnier.” How easily a liquid flows is called viscosity. Water has a low viscosity and flows fast. Honey has a high viscosity and flows slowly. If you heat honey or lava…it flows faster. That is one of Sir Isaac’s rules too…that the viscosity of liquids goes up as the liquid is heated. Mix up this borax or corn starch goo and see how it behaves. Is it a liquid or is it a solid?

What You Need

Cornstarch Goo:

• Cornstarch
• Water
• Bowl
• Measuring Cup
• Cookie Sheet or Tray – with sides!
• Gallon Size Ziploc Bag (optional – for storage)

Borax Goo:

• White Glue
• Borax (in the laundry detergent aisle)
• Water
• Bowl
• Ziploc Bag
• Measuring Cups
• Spoon
• Cookie Sheet
• Food Coloring (Optional)

Put 1 cup of cornstarch or borax in a mixing bowl. Add water slowly – about 1/2 cup. Mix the goo with your hands until it starts to feel like a sticky glue. Try to pick up a handful of the goo. Squeeze your hand around the goo to make a fist around it. What happens? Now relax your hand. What happens now? Pour the goo onto a cookie sheet or tray. Make sure the sheet or tray has sides! Lay your hand on top of the goo and leave it there for a few seconds. Pull your hand straight up and watch what happens.

Cornstarch or borax goo is an anomaly – that means it’s weird! It doesn’t act like it should. The goo seems like a liquid because it flows off your fingers and it takes the shape of the container you put it in. But when you squeeze the goo…it turns into a solid. So which is it? A liquid or a solid? These goos are called a non-Newtonian fluids because they don’t behave by Sir Isaac Newton’s rules.

Polymers

Cornstarch and borax goo are also a polymer. That means their molecules are arranged in a long chain. When the chain of molecules stretches…like the goo flowing off the fingers in this photo, the goo behaves like a liquid and flows. As soon as the goo has pressure applied to it – like when you squeeze it in your fist or when you rest your hand on it in the tray, it behaves like a solid and feels stiff and strong. With goo, the viscosity changes when you put pressure on it instead of when you heat it. Weird again!

Science Project Idea

Get three bowls and measure 1 cup of a powdered substance into each bowl. 1 cup of cornstarch in bowl #1, 1 cup of baking soda in bowl #2 and 1 cup of flour in bowl #3. If you step back and look at the bowls they will all look pretty much the same – a bowl with white powder in it. Now pour 1/2 cup of water into each bowl and mix each bowl with your fingers. Do the mixtures behave the same? How do they behave differently? How would you describe each mixture? A solid or a liquid? You could also try baking soda and powdered sugar.

Websites, Activities & Printables

• SciShow Kids Video: Let’s Make Slime!
• Exploratorium: Outrageous Ooze
• Science Bob: Make Slime with Starch
• Science Bob: Make Slime with Glue and Borax
• The Museum of Science and Industry: Hands-on Science – Slime
• Steve Spangler Science: Non-Newtonian Cornstarch Recipe
• Oregon Museum of Science and Industry: Flubber
• Steve Spangler Science: How to Make Slime
• Bizarre Stuff: Slime
• 10 STEM Activities for Oobleck, or Corn Starch Goo
• Amazeum Oobleck Printable Activity Guide

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

Crystals are made when a substance has atoms or molecules that form in a very organized, repeating, 3D pattern. Usually when we think of crystals we think of some well-known gemstones like diamonds or rubies, but there are some very common crystals too. Sugar, ice, snowflakes, salt…all of these are crystals. You can make your own baking soda crystals grow!

What You Need

• 2 Glasses or Jars
• 1 Plate
• 1 Spoon
• 2 Paper Clips
• Hot Tap Water
• Piece of Yarn or Cotton String, about 6 inches long
• Baking Soda

Instructions

Fill each glass with water. Add 2 tablespoons of baking soda to each glass. Stir the mixture. If all of the baking soda dissolves, add a little more baking soda and stir. Add baking soda until the water can’t dissolve it anymore, the mixture is saturated. That means the water is holding as much of the baking soda as it can. You can add a few drops of food coloring to each glass to make the crystals colorful. Tie a paper clip to each end of the piece of yarn or string. Drop one paperclip into each glass letting the string dangle in a smile shape in between the glasses but not touching the plate. Watch the string over the next few days to see the crystals form along the string.

The picture on the right shows you what the baking soda crystals will look like after a few days. As the days go by and the water in the baking soda solution evaporates, the level of the water will go down. Make sure the end of the string with the paper clip on it stays submerged in the baking soda water in the glass.

Science Experiment Idea

Grow more than one kind of crystal. Use salt, sugar, and baking soda. Keep a chart as you observe how the crystals grow over the next few weeks. Which one do you think will grow the biggest? Which one will form the fastest?

• Try to grow crystals another way: Borax Crystals – Supersaturation

Websites, Activities & Printables

• San Diego Natural History Museum: All That Glitters
• Exploratorium: The Science of Rock Candy
• Science Bob: Make Your Own Rock Candy
• Scholatic: Homemade Rock Crystal Candy
• Martha Stewart Crafts: Borax Snowflakes
• Baking Soda Stalactites

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books & Audiobooks

Use your indyPL Library Card to check out books about crystals at any of our locations, or check out e-books and audiobooks about crystals from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to useaudiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.

While building sand castles, there is a certain kind of wet sand that is perfect for it. When there is too much water in your bucket the mixture is too soupy. When there is too little water in your bucket the sand won’t hold a shape and just crumbles. How does the perfect mixture of sand and water work? Surface tension is the attraction that happens between water molecules. Water molecules are attracted to each other. The surface of water has an elastic quality because the molecules are hugging close together. This is why some insects can walk on water.

Water is made up of two kinds of atoms, hydrogen and oxygen. The name for the water molecule is H20, it has 2 hydrogen atoms and 1 oxygen atom. Water molecules are attracted to each other because hydrogen atoms and oxygen atoms are attracted to each other and hug close together really tight. This is called cohesion. The molecules hug so close together they don’t want to touch other molecules around them. That’s why a bubble or a drop of water is round and only rests a small part of itself on a surface when it lands.

When you add sand to water, the surface tension of the water forms little elastic bridges between the grains of sand. When the ratio of sand to water is just right these bridges are the perfect strength for building sand castles. In today’s experiment you will be able to watch these bridge at work and figure out the best recipe for building sand castles.

What You Need

• 12 Dixie Cups
• Sand
• Water
• 25 Pennies
• 4 Large Plates
• Large Bowl
• Measuring Cups (1/4, 1/3, 1/2, 1)

Instructions

You are going to test what ratio of sand to water is the best one for building a strong sand castle. Label each plate – label the first one 1/4 cup, the second one 1/3 cup, the third one 1/2 cup and the last one 1 cup. For each trial you are going to use 1 cup of sand. The variable in this experiment is going to be the amount of water you add to the sand. For the first trial mix 1 cup sand and 1/4 cup water in the bowl.

Fill three dixie cups with this mixture and turn them over to make small sand castles in the plate labelled 1/4 cup. Do the castles flatten or stay formed like the dixie cup? If any of them stay formed, stack pennies on top of the little castle one at a time until the little castle collapses. Write down how many pennies each little castle could hold. Repeat this test using 1 cup sand and 1/3 cup water, 1 cup sand and 1/2 cup water and 1 cup sand and 1 cup water. Keep track of your results on a chart like this:

Amount of Water	#pennies trial #1	#pennies trial #2	#pennies trial #3
1/4 Cup
1/3 Cup
1/2 Cup
1 Cup

One cup of sand to 1/3 cup water is what worked for us!

It turns out that water molecules attract to each other and they ALSO attract to sand. If you have a good balance of sand to water…nice and sticky…then you get a strong sand castle. When there is too much sand the mixture is too dry and the castle crumbles. If there is too much water the mixture is too wet and oozes all over the place.

Websites, Activites & Printables

• NASA: The Physics of Sandcastles
• Sand Castle Physics Revealed
• Sand Castle Central
• USGS Water Science School: Surface Tension
• Video: NASA STEMonstrations – Surface Tension
• Video Khan Academy: Surface Tension

You can also ask a math and science expert for homework help by calling the Ask Rose Homework Hotline. They provide FREE math and science homework help to Indiana students in grades 6-12.

e-Books and Audiobooks

Use your indyPL Library Card to check out books about Science Experiments at any of our locations, or check out science experiment e-books and audiobooks from OverDrive Kids right to your device! If you have never used OverDrive before, you can learn how to use e-books and learn how to use audiobooks.

Need more help? Ask a Library staff member at any of our locations or call, text or email Ask-a-Librarian. Additionally, the Tinker Station helpline at (317) 275-4500 is also available. It is staffed by device experts who can answer questions about how to read, watch and listen on a PC, tablet or phone.