1. Isaac Newton and Gravity
An Invisible Force

2. Gravity
• Every object pulls on
every other object
with an invisible force
called gravity.
• There is gravity
between you and your
toy car, but you won’t
notice it because it is
so weak.

3. Gravity
• You can, however, feel
the pull between you
and the Earth.
• That’s because the
force of gravity
depends on an
object’s mass, and the
Earth has a lot of
mass.

4. Gravity
• The earth has so
much mass that it
pulls everything
downward toward its
center including the
oceans and air.
Even the moon
stays above the
Earth because of
gravity.

5. Isaac Newton
• Over 300 years ago a
scientist named Isaac
Newton explained
this invisible force of
gravity.

6. Newton’s Discovery
• Newton was sitting in
his garden when he
saw an apple fall from
a tree.
• He decided that some
force must be pulling
the apple to the
ground.
• He called it gravity.

7. Test Your Knowledge
• You already know a
lot about gravity.
• That’s because it’s at
work all the time.
• Let’s test your
knowledge.

8. Is Gravity Working?
Is gravity working?
yes or no

9. Is Gravity Working?
Is gravity working?
yes or no

10. Is Gravity Working?
Is gravity working?
yes or no

11. Is Gravity Working?
Is gravity working?
yes or no

12. Is Gravity Working?
Is gravity working?
yes or no

13. Is Gravity Working?
Is gravity working?
yes or no

14. Is Gravity Working?
Is gravity working?
yes or no

15. Is Gravity Working?
Is gravity working?
yes or no

16. Is Gravity Working?
Is gravity working?
yes or no

17. Fighting Against Gravity
We can overcome but we have to use force
gravity, to do it.

18. More About Gravity
• Hang On!
• There’s more
to Come!