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Lesson 02 – The Force of Gravity

Read About the Force of Gravity


Read the vocabulary terms to understand the reading better.


A direction is a path along which something moves, lies or points.


A force is the push or pull on an object that makes it move.


Gravity is the force that makes things fall and pulls things to the ground.


Speed is how fast something is moving.

The Force of Gravity

Gravity is the force that makes things fall. Gravity is a force that pulls things to the ground. Gravity stops objects from floating up. Gravity holds things down.

Remember four things that forces can do:

  1. Make an object start moving
  2. Make an object stop moving
  3. Change the speed of an object
  4. Change the direction of a moving object

The force of gravity can do the same things.

Gravity Makes an Object Start Moving

If you let go of a ball, the ball drops to the ground. You do not need to push the ball to make the ball fall. Gravity makes the ball start moving.

Gravity Makes an Object Stop Moving

If you toss a ball up, the ball will soon start to fall. Before the ball starts to fall, the ball will stop in the air. The ball stops for a very short time. You do not see the ball stop. The force of gravity makes the ball stop going up.

Gravity Changes the Speed of a Moving Object

When an object falls, the object moves faster and faster as it gets closer to the ground. Gravity makes things move faster as they get closer to Earth.

Gravity Changes the Direction of a Moving Object

If you throw a ball to a friend far away, the ball starts to fall. The direction of the ball changes. The ball starts to fall down. Gravity changes the direction of the ball.

To learn more about the force of gravity, watch the video by Crash Course Kids on Youtube.

Now Show What You Know!

Complete some questions about the reading selection by clicking “Begin Questions” below.