beaker on bunsen burner.gif (3467 bytes)   Science Experiments

These are fun experiments using things you can easily find at home, or at a regular store.  They are great for illustrating science concepts you are learning.  The answers are not supplied for these experiments; they are for you to research out of books.  If you can't find the answer, contact us here through this website and we will help!

Air Pressure

1. Make one small hole in a can of juice. Try to pour out some juice. Why is it hard for the juice to come out?

2. Push a piece of paper down into a glass. Turn the glass over and push straight down into a sink of water until the glass is under water. Does the paper get wet? Why?

3. Push a suction cup hard against the floor. Now pull up. What happens? Why?

4. Cut a circle of paper a little larger than the diameter of the top of a drinking glass. Fill the glass with water to the very top. Put the paper on top. Turn it upside down. Does the water spill? Why?

5. Does air have weight? Make a balance for weighing things like this. Adjust the balance by sliding the tread holding the nail, along the wire, back and forth. Now let the air out of one of the balloons by prying the paper clip open. What happened? Why?

6. Blow up a balloon a little way. Now put a book on the balloon. Blow into the balloon. What happened? Why?

7. Try to stick a baggie against a dry shower wall. Now try to stick the baggie against a wet wall. Why does it stick now?

8. Put the back of a spoon in a stream of water. What is pushing on the spoon?

9. Fill a pitcher with water. Put it on the counter. Put a hose into the water with the other end of the hose in the sink. Suck on the end of the hose in the sink until water flows out. Why is it flowing out?

10. Notice how you breath. Completely relax. You breathed out, right. Now how can you get air to go into your lungs? You move your diaphragm, at the bottom on your chest, down. Why would that make air go into your lungs?

11. Get an empty milk carton. Rinse it with cold water, then pour the water out. Now put the cap on tightly. Get the water in the sink running very hot. All at once put the milk carton under the hot water. What happened? Why?

12. Make a barometer like this. How does it work? What would happen if you took it up on top of a mountain? When the barometer shows that the air pressure it dropping, what kind of weather can we expect?

13. Put a ping pong ball into a funnel. Can you blow the ball out? Why?

14. Make a tunnel as shown. Blow through the tunnel. What happened? Why?

15. Chill a pop bottle. Wet the mouth of the bottle with water. Place a penny on top. Now hold the bottle in your hands. What happens? Why?

16. Fill a milk container with water. Fill the sink half full of water. Place the milk container upside down in the sink. Put a hose into the container, with the end on the counter. Take a deep breath, and blow out through the hose. How much water was pushed out? What does this tell you? Who can push out the most water?

17. Put some water in a glass. Put two straws in your mouth, but only put one straw in the water. Can you drink the water? Why is it so hard?

18. Put a straw into a tall glass of water. Put your finger over to top of the straw. Lift the straw out of the water. What happened? Why?

19. Hold a piece of poster board in front of you. Can you run down the sidewalk holding it? Why don't they make cars square?

Properties of Water

1. Put a large pan of hot water on the stove. Put two small wooden cutting boards over the pan. Balance a glass bowl upside down on the boards. Put some ice on the top of the glass bowl. What happens? Why?

2. Put some water on the back of your hand. Blow on it. What do you feel? Why?

3. Fill a bottle with water. Cap it tightly. Wrap the bottle with masking tape. Leave it in the freezer overnight. What happened? Why?

4. Put a pinwheel under a stream of water. What happened? How many ways can you think of to use water to do work?

5. Put a drop of water on a piece of wax paper. What do you see? Why does water act like that?

6. Set a glass of water on the counter. Do you see bubbles of air forming inside the glass? Where did they come from?

7. Attach two insulated wires to a flashlight battery and dip the ends into water which has vinegar has been added. What do you think the bubbles are?

8. Pile up some dirt on a cookie sheet on the counter. Put a plastic bucket in the sink. Put a block under one end of the cookie sheet to raise it slightly. Position the cookie sheet so that any dirt or water that spills will fall into the bucket. Pour water from a pitcher on the top of the cookie sheet. What happened?

9. Measure a half cup of water into a pan. Add salt to the water one teaspoon at a time. Stir until the salt dissolves (disappears in the water). Keep dissolving more salt until no more dissolves and the solutions is saturated. Now put the pan on the stove and heat it. Now continue to add salt. What happened? Why?

10. Put some water in a glass. Try to dissolve different things in the water. Get fresh new water for each substance. Try to dissolve:
salt, sugar, baking soda, a tiny bit of dirt, a bit of Crisco, cooking oil, chicken broth mix, cinnamon, a tiny piece of chalk. A tiny rock. Which ones dissolved in the water? Which ones didn't?

11. Measure out a half cup of water into a small pan. Measure out 1 cups of water into the other small pan. Put them both on the stove and turn the burners to high. Watch the clock and write down how much time it took for each pan of water to boil. Which one boiled first? How much longer did it take the other one to boil?

12. Fill a jar with ice cubes. Fill the spaces between the ice in the jar with water to the very top. Put the top on the jar so that all the ice is under water and the water is all the way to the top. Allow the ice to melt. What happened to the level of the water in the jar? Why?

13. Put some dry beans in a jar. They are old. Probably over 20 years old, but they are not rotten. Now cover the beans with water. Put the top on. Place the jar in a warm dark place for a week. What happened?

14. Fill a glass to the very top. Now drop small objects like paper clips and small nails carefully into the water. Did the water spill? Why?

15. Put some water in a bowl. Sprinkle a little powder in the water. Touch a soapy toothpick to the powder in the water. What happened? Why?

16. Put some water in a bowl. Make a small circle of silk thread by tying a knot. Float the thread on the water. Touch the inside of the loop with a soapy toothpick. What happened? Why?

17. Dip a pencil into water. The pencil wood attracts the water, so the water sticks to the pencil. That is called "adhesion".. Notice the water drop hanging from the end of the pencil. The water clings to itself, that is called "cohesion". Get a new pencil. Rub the tip with Crisco. Dip it in the water. Is it wet? Why?

18. Punch 3 holes close together in the side near the bottom of a can. Add water to the can so the water flows out of the holes. Now "pinch" the streams of water together. What happened?

19. Turn on the faucet gently. Put a spoon in the flow. Can you make a sheet of water? What holds the water together like that?

20. Put some water in a bowl. Break a toothpick so it is quite small. dip ONE end in hand soap. Now carefully drop the toothpick onto the water. What happened? Do you know why?

21.Put some water in a bowl. Put a tiny piece of tissue on the water. Place a clean pin on the tissue. Use a clean toothpick to push the tissue to the bottom of the bowl. Now your pin is floating. Why?
Now add just a tiny drop of detergent to the water in the bowl. What happened? Why?

22. A. Put a drop of water in a piece of waxed paper. What shape is the drop. Why? Why is the drop flattened?
B. Now try to make an almost perfectly round drop. Fill a glass half full of water. Add a small drop of oil to the water. Now very carefully, use an eye dropper to pour rubbing alcohol down the sides of the glass. It floats on top of the water and oil. What shape is the oil drop? Why?
READ: Glass marbles are made by dropping molten (melted) blobs of glass from a high tower. As they fall they form a sphere. By the time they get to the bottom the glass has hardened into a perfect spherical marble. BB shot is made the same way.

23. A.Put three drops of water in one bowl and three drops of alcohol in another bowl. Watch carefully. Which one evaporated first?
B. Wrap a small amount of tissue paper around two thermometers. Dip one in water and one in rubbing alcohol. Shake the thermometers back and forth very gently. What happened? Why?. What have you learned about evaporation? Why do people like to get wet when it is hot weather? How could you use evaporation to keep food cool?

24. Put some ice in a glass. What forms on the outside of the glass? Do you think the same amount would always form everyday, or would it vary in different places and on different days? When it is a humid day there is more water in the air. Why do we feel hotter when it is humid?

25. A. Get 2 jars. Put water in them. Now get some dirt. Mix some dirt into each of the jars of water. Set the jars aside until the next day. What happened to the dirt? Why?
B. Get a large can. Punch a small hole in the side near the bottom. Make it so that when water goes out of the hole it will flow into a clean jar. Put some crushed gravel about 2 inches deep in the bottom of the can. Now add some clean washed sand until the can is 3/4 full. Take one of the jars of water and dirt and mix the dirt back into the water. Slowly pour the dirty water into the can with the sand. What happened? Why? Does this give you an idea of two ways to clean water?
C. Put some water in the tea kettle. Add 2 tablespoons of salt to the water and stir. Taste a tiny bit of the water. Would you want to drink it? Can you drink sea water? Put a jar over the spout of the tea kettle. like this.
Put the jar in a bowl of ice. What happened? Taste some of the water in the jar. Can you drink this water?

27. Learn about osmosis from this experiment. Chip the shell from one end of a fresh egg, being careful not to break the membrane or white tissue just inside the shell. The opening should be about the size of a nickel. Make a hole about the size of a lead pencil in the opposite end of the egg through the membrane to the white. Place a transparent soda straw into the small hole being careful not to break the yolk. Seal the opening around the straw tightly with drippings from a lighted candle. Place the egg in a small glass full of water. After two or three hours examine the egg. What happened? Why? The egg membrane has allowed osmosis of the water to occur.

(Some people think that if they sleep with their school books under their pillows, that they will gain knowledge by osmosis! Just kidding!)

28. Fill a glass with water and drop an egg into it. Did it sink? Now add a tablespoon of salt to the water and mix carefully. What happened? Why?

29. Color a small amount of water with food coloring. Dip in a capillary tube. What happened? Why?

30. Fill a glass half full of water. Add a few drops of red or blue food coloring. Cut one half inch from the bottom end of a stalk of celery. Immediately place the cut end in the colored water. Look at it the next day. What happened? Why?

Plants

1. Line the inside sides of a glass with a paper towel. Put a few radish seeds between the towel and the glass just below the rim. Keep the towel moist. In a few days, when the plant has a few leaves Turn the glass upside down and support the glass on two strips of wood, or block. Keep the towel moist. What happened?

2. Soak a lima bean over night in water. Pry apart the two halves of the seed and find the tiny leaves, stem and root of the young plant.

3. Get 6 paper cups and put soil in them. Plant 3 radish seeds in each one. Keep the soil moist and put the cups in a sunny window. After a week make 5 strips of masking tape. Label them like this:
1  air, water, food, light
2  no water
3  no air
4  no food
5  no light
Put the labels on the cups. You will have one extra, set it aside.

Cup 1: Put cup 1 in a sunny window. Keep the soil moist.
Cup 2: Put cup 2 in a sunny window but do not water it.
Cup 3: Put Vaseline on the bottom of the leaves of cup 3. This will block the breathing" holes of the plant. Put it in a sunny window and keep the soil moist.
Cup 4: Gently wash the soil from plant 4. Wash out the cup. Half fill the cup with water. Support the plant in the water with toothpicks taped across the top of the cup. Put it in a sunny window. Make sure the water stays at the same level.
Cup 5: Put cup 5 in a dark closet. Keep the soil moist.

After 2 weeks observe the plants. What happened? Why?

4. Leave a stalk of celery on the counter overnight. What happened to it? Now cut a small amount off the end of the stalk and immediately place it in a glass of water. Put a few drops of food coloring in the water if you wish. Several hours later see what happened to the celery. Why?

5. Grow 10 plants in one very small pot, and 1 plant in another plant. After several weeks, what happened? Why?

6. A drop of iodine on moistened starch makes it turn black. Test beans, potatoes, bread and other food with iodine after wetting the food. Which foods have starch?

7. Cover a young radish plant with a paper cup that has a hole cut out of the back. Put it in a sunny window with the hole facing away from the window. After a while, what happens?

Microbiology

1. Place a piece of moist hamburger bun in a closed plastic dish. Keep it in a dark place for a week. What happened? Why? Observe the mold carefully. Do not open the dish.

2. Put some plant food in a jar of water. Put it in a sunny window. What happened? Look at a drop of the water under a microscope.

3. Take a piece of scotch tape and touch the sticky side to a place you think bacteria or molds might be. Then touch the tape to agar in a petre dish. Label the top of the dish with the place your speciman came from. Keep the dish in a warm dark place for several days. What happened?

Magnetism

***CAUTION: WHEN TOUCHING STEEL WOOL, DO NOT TOUCH YOUR FACE OR EYES!

1. Use you magnet to kind out what things in the house it will stick to. What did you find out?

2. Put a small amount of steel wool in a zip lock back. (Do NOT remove the iron filings at any time!) Crumble it up with your fingers. Lay a magnet flat on the table. Shake the bag with the filing gently over the magnet. What happened? Why?

3. Make a magnetic construction using several strong magnets and various iron or steel objects such as washers, nails, etc.

4. Bring the head of a small nail just under the center of a rod shaped magnet. What happened? Why?

5.Hang a magnet from the center. Hang it away from iron objects such as pipes. Mark one end of the magnet. Try to change the way the magnet points. When you let go what happens,Why?

6. Use two long magnets. Suspend each magnet from a string in the middle. Find which end points north. Mark the end with a crayon. Do it with the other magnet. What happens when you put the south end next to the north end of the other magnet? What happens when you put the two north ends together. Find the two ends that stick together. They ATTRACT. Find the two ends that put apart, they REPEL.

7. Magnetize a needle by touching its tip to a south pole of an ainico magnet. When placed on a floating cork, the needle is turned around by the earth's magnetism and points north.

8. Why are some materials magnetic while others are not? Scientists think that the atoms of all materials are little magnets, each with a north and south pole. If the atoms are arranged with their poles pointing in every direction, then the attraction or repulsion of a north pole is cancelled by the opposite force of a nearby south pole. So magnetic force is not noticed outside the magnet.

Bit if most of the atoms have their poles lined up as shown in the drawing then the attraction or repulsion of all the north poles at one end are not cancelled out, and the magnetic force is noticed. At the other end of the magnet the forces exerted by the south poles of the atoms build up into the strong force of a south pole.

The center of a magnet is weak because the force of every north pole is canceled by a nearby south pole.

Sound

1. Next time you are swimming have someone stand at the other end of the pool and strike two rocks together. Then both of you dunk under the water and have the person strike the rocks together under water. What do you notice? Why?

2. Place a ticking watch on a table. Stand at the other end of the table. Can you hear it tick? Now put your ear down on the table. What happens, why?

3. Make a tin can telephone. Why does it work?

4. Sound is waves. Fill the sink or bathtub with water. Tap the water with a pencil. What happened? Now add 3 or 4 wood chips from the pencil sharpener. Tap the pencil again. Do the wood chips move outward with the waves? What does that tell you about the waves.

5. Get a long rope or cord. Have someone hold one end. Move the other end quickly up and down. What do you observe? Now move it faster. What happened, why?

6. Make a musical instrument with strings.  How does it make music?

7. Make a musical instrument with glasses. Fill glasses with different amounts of water. Pat lightly with a spoon to make a pleasing sound. How can you make music this way?

8. Make a "trombone". Fill a pop bottle with water. Put a straw in the bottle. Blow across the straw. To make different notes, lower the bottle but hold the straw steady so that the length of air in the straw is longer. How does this make music?
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