Float or Sink?

Lab Brief #3

🎯 Your mission

Understand the idea. Then look for it everywhere.

⚡ The twist

If it bubbles, something invisible is escaping.

What you'll learn

Wood floats in water, but a rock sinks. Heavy things often sink.

Key words · 1 of 2

water
A clear liquid made of hydrogen and oxygen that living things need.
heavy
Having a lot of weight and hard to lift.

Key words · 2 of 2

sink
To go down and settle below the surface of a liquid.

Make a hypothesis first

Guess: will the fizz be loud, soft, or none at all?

Say your guess out loud — then find out if you were right.

Step 1 of 4 · Read

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

Step 2 of 4 · Do

Drop a rock and a feather into water. Which one sinks? Which one floats?

Step 3 of 4 · Observe

Use your eyes, ears, and hands to explore. What do you notice?

Step 4 of 4 · Record

Color a picture to show what happened.

Question 1 of 3

Does a rock sink in water?

Question 2 of 3

Does wood float in water?

Question 3 of 3

Does a feather float in water?

Mind = blown

🧪 If you could remove all the empty space from atoms, the entire human race would fit in a sugar cube.

Nice work!

You got 0 of 3 right.

Next: Melting Ice All lessons

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✨ More to explore

🌍 Where you see this in real life: Your toothpaste, your soap, even your breakfast involves this.

🏆 Stretch challenge (try it this week): Ask a grown-up to help you mix two safe kitchen things. Predict what will happen first.

👨‍👩‍👧 For the dinner table: “What's something we cook that mixes things together this way?”

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