Some people jump out of planes.
They fall.
This is sky diving.
A lot of people sky dive.
Planes are pulled to the Earth.
A force pulls them down.
A force is a pull.
This force is gravity.
We do not see it pull.
We can see the effects of it.
Things fall down.
Look at the sky diver.
Do you see him fall?
We do not see gravity.
It is what pulls him down.
What are things that fall?
A ball will fall.
A toy plane falls.
Rain falls.
What things will fly?
The bird can fly.
The bird must land to rest.
Things that fly must still land.
Gravity pulls on the bird.
Gravity can pull over a long way.
It holds the Moon in place.
The Sun has gravity too!
The Earth goes around the Sun.
The Sun holds Earth in place.
The Sun pulls on all the planets.
What if there was no gravity?
We could not play games.
Plant roots would not grow down.
Pour a drink.
What does it do?
It goes down to the cup.
Gravity keeps it there.
Do you have a book on your desk?
What holds it there?
We can throw away trash.
With no gravity, it would float.
That would be bad!
1. What are some things that fall?
2. Why do things fall?
3. How can you stop something from falling?
NOTES / HIGHLIGHTS
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