The Rock Cycle

Lab Brief #3

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

Weather isn't random — it's just complicated.

What you'll learn

The rock cycle shows how rocks change from one type to another. Igneous rocks form from cooled magma, sedimentary rocks form from compressed sediment, and metamorphic rocks form under heat and pressure.

Key words

water cycle
The way water moves from clouds to rain to rivers and back.
sediment
Bits of sand, mud, and rock that settle and pile up.
igneous
A rock that forms when melted rock cools and hardens.

Make a hypothesis first

Before you observe: what shape will it leave?

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

Get ready

🧰 What you need

rocks
water
plastic tray

⚠️ Safety first

Wash your hands thoroughly afterwards and keep the material away from your face.
Mop up spills straight away so nobody slips, and keep liquids away from sockets.

Step 1 of 4 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 4 · Do

Model erosion: tilt a tray of soil and pour water from a cup at the top. Observe how channels form. Try adding plants or rocks to slow the erosion.

Step 3 of 4 · Observe

Compare the before and after states.

Step 4 of 4 · Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Question 1 of 3

What type of rock forms from cooled magma?

How sure are you?😐 maybe

Question 2 of 3

What type of rock forms from compressed sediment?

How sure are you?😐 maybe

Question 3 of 3

Which type of rock forms under heat and pressure?

How sure are you?😐 maybe

Mind = blown

🌊 The deepest part of the ocean is deeper than Mount Everest is tall.

Nice work!

You got 0 of 3 right.

Next: Reading Rock Layers All lessons

🎯

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✨ More to explore

🌍 Where you see this in real life: Today's weather, tomorrow's beach, next century's coastline — all this.

🏆 Stretch challenge (try it this week): Look at the sky for 5 minutes and try to predict tomorrow's weather.

👨‍👩‍👧 For the dinner table: “What's the slowest change you can think of?”

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