🍎 What Is Gravity?
3rd Grade ⚛️ Physics
Gravity is the force that pulls things toward each other. It keeps your feet on the ground and the Moon circling Earth.
A pulling force
Everything with mass pulls on everything else. The bigger the object, the stronger its pull. Earth is huge, so its gravity pulls you, your ball and the rain down toward it.
Newton’s apple
Isaac Newton described gravity in 1687. A famous story says he got the idea watching an apple fall from a tree and wondered if the same force holds the Moon in its orbit. It does!
Gravity in space
The Moon’s gravity is about one-sixth of Earth’s, so astronauts can bounce high there. Gravity also keeps Earth and all the planets traveling around the Sun.
Quick quiz
What does gravity do?
Who described gravity in 1687?
On the Moon, gravity is…