Floating Ball



The floating ball game is one of the easy science experiments and indoor and learning games for kids.



Pre-Show

Need: small balloon or ping pong ball, hair dryer

Go!

Get a hair dryer and hold it so the nozzle is facing straight up towards the ceiling.

Turn the hair dryer on.

Take the ball or balloon and place it about 5 inches from the hair dryer in the stream of hot air.

Let go and you should see the ball floating in the air!

Grab the ball with your hand and move it to the side, make sure part of it is still in the stream of hot air.

You should feel the ball trying to get back to the center of the air flow.

Move around the room if you can all the while balancing the ball.

See what parts of the room make the ball go higher in the air (hint - try a corner!).

Then move to the middle of the room. Notice a difference?

Try both a balloon and a ball. Which one seems to stay up in the air longer?

Is one harder than the other to keep afloat? How long does the balloon stay in the air. What about the ball?

Now try BOTH a balloon and a ball. Is the air stream wide enough to keep both afloat?

Does one seem to be floating in the air easier than the other? Is one able to go higher in the air than the other?

Enjoy seeing a floating ball!


Floating Egg

One of the easy science, water and cool cooking activities for children.

Eggs can't float can they? Won't they sink if dropped into a bowl or glass full of water?

Won't gravity pull the egg straight down? Well, let's try this experiment and find out!

Before You Start

Need: one egg, large jar, water and salt

Begin

Fill your jar 1/2 full with water then place the egg in the jar and water. Your egg should sink to the bottom.

Remove the egg and set it aside.

Place 2 teaspoons of salt into the water and stir until the salt is mixed up.

Get your egg and place it back in the jar. Your egg should float!

If it doesn't, try adding a little bit more salt to your water.

Do you now have a floating egg?

Teachers

Younger elementary aged kids will find this fascinating. Young minds love to find something out that defies logic.

If doing this in class, be sure to have more eggs so that each child has his own egg, glass and water to experiment with.

Variation

Try using two different types of salt - table salt and sea salt.

Does one type of salt make the egg float quicker without having to use a lot of salt?

Try mixing table salt and sea salt in the same glass then observe your egg.

Any differences noticed in floating or sinking time? What about the amount of salt that's needed to keep the egg afloat?







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