Lesson 9 of 10 · Light and Sound

Lesson⭐ 30 XP⚡ Spark Lab

What Is a Fair Test?

🧪Lab Brief #9

Light and Sound.

🎯 Your mission

Master the concept. Use it tomorrow.

⚡ The twist

The opposite of what you expect is often what happens.

🤯

Mind = Blown

🔥 A bolt of lightning is 5 times hotter than the surface of the sun.

🔮

Make a hypothesis first

Predict: what happens if you double the force?

What You'll Learn

A fair test changes only one thing. If you change two things, you will not know which one made the difference.

Key Words

Tap a word to see its definition.

Steps

Step 1 — Read

Look at the new words. Can you say each one?

Step 2 — Observe

Watch carefully. What happens?

Step 3 — Record

Draw and write about what you learned.

Check Your Understanding

Question 1

1 of 3

What does a magnifying glass do?

How sure are you going to be?😐 maybe

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Where you see this in real life

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

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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.”

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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.

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Ready?