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Gravity
1.
2. What is Gravity?
• Gravity is the invisible force of
attraction between every bit of
matter in the universe.
3. Who did discover the Gravity?
• The mathematician and physicist Sir Isaac
Newton is said to have developed his ideas
about gravity while sitting one day under
an apple tree.
4. What is a Force?
• A force makes something move, by
pushing or pulling it. Gravity is an
invisible force.
5. Does Gravity change?
An object’s gravitational pull changes
with its mass and distance. In
fact, gravity decrease precisely in
proportion to its distance .
6. How does Gravity hold you
down?
The mutual gravitational attraction
between the mass of your body and the
mass of the Earth pulls them together.
7. Why can you jump higher on the
Moon?
The Moon is much smaller than the
Earth, so its gravity is much weaker.
Astronauts weigh six times less on the
Moon than they do on the Earth, and can
jump much higher.
8. What’s the difference between mass
and weight?
• Mass is the amount of matter in a object. It is
the same wherever you measure it, even on
the Moon.
• Weight is a measure of the force of gravity on
a object. It varies according to where you
measure it.
