73
Lesson 73 of 84 · Simple Machines
LessonBalls That Bounce (Part 3)
What You'll Learn
Rubber balls bounce because they are stretchy and springy.
Key Words
- heavy
- light
- wheel
Steps
Step 1 — Read
Can you name the things in the picture?
Step 2 — Do
Roll a ball down a ramp. Try making the ramp steeper. What happens?
Step 3 — Observe
Use your eyes, ears, and hands to explore. What do you notice?
Step 4 — Record
Color a picture to show what happened.
Check Your Understanding
Question 1
1 of 3What makes a swing go?