20
Lesson 20 of 84 · Forces
ExperimentSlide or Roll?
What You'll Learn
Springs store energy when you squish or stretch them. When you let go, they bounce back!
Key Words
- pulley
- wheel
- energy
Materials Needed
- cardboard
- marbles
- paper clips
Safety First
- Protect your work surface with newspaper or plastic.
Steps
Step 1 — Read
Read and learn: Springs store energy when you squish or stretch them. When you let go, they bounce back!
Step 2 — Do
Follow the steps one at a time.
Step 3 — Observe
Compare what happened to what you predicted.
Step 4 — Record
Tell the class one thing you learned today.
Check Your Understanding
Question 1
1 of 3Why do things fall when you drop them?