Lesson 73 of 84 · Forces

Simulation⭐ 30 XP⚡ Spark Lab

Balls That Bounce (Part 3)

🧪Lab Brief #73

Balls That Bounce (Part 3).

🎯 Your mission

Push the limits. See what changes.

⚡ The twist

Energy never disappears — it just hides somewhere else.

🤯

Mind = Blown

🎢 You feel weightless on a roller coaster because you and the seat are falling at the same speed.

🔮

Make a hypothesis first

Before you start: which will move faster, and why?

What You'll Learn

Rubber balls bounce because they are stretchy and springy.

Key Words

heavy
light

Steps

Step 1 — Read

Say the vocabulary words out loud. Can you repeat them?

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 3

What makes a swing go?

How sure are you going to be?😐 maybe

🌍

Where you see this in real life

You use this every time you flip a light switch, ride a bike, or kick a ball.

🏆

Stretch Challenge

Try this in real life this week.

Time how long a small ball rolls down something, then change the slope and try again.

👨‍👩‍👧

For the dinner table

“Show me something at home that uses this kind of energy.”

🎯

Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

🧲Share card

Share this experiment

Send it to a parent who's looking for a 10-minute kitchen science win.

🖨️

Checkout complete lesson on Forces for Kindergarten

Get the full Forces track as a printable PDF — all lessons, worksheets, and answer keys.

View in Shop

Done with science? Try something else

🎮Science Games 🔢Math 📖Flashcards 🖨️Print Worksheet 💻Coding 🛍️Shop 🎲I'm Bored