What Makes a Ball Roll?

What You'll Learn

When you throw a ball up, gravity pulls it back down. The harder you throw, the higher it goes!

Keep small objects away from young children.
Work in a well-ventilated area when using vinegar or other strong-smelling substances.

Step 1 — Read

Read about Forces with a partner or grown-up.

Step 2 — Do

Push a toy car across the carpet, then across a smooth floor. Measure how far it goes each time.

Step 3 — Observe

Watch carefully. What happens?

Step 4 — Record

Draw and write about what you learned.

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What is gravity?