How Deposition Builds Land

Lab Brief #4

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

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

What you'll learn

Deposition is the process of dropping eroded rock and soil in a new location. When wind, water, or ice slows down, it releases its sediment, gradually building landforms like deltas, sandbars, and beaches.

Key words

rock cycle
The slow process where rocks change from one type to another.
sediment
Bits of sand, mud, and rock that settle and pile up.
water cycle
The way water moves from clouds to rain to rivers and back.

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

Observe what happens and describe it in detail.

Step 4 of 4 · Record

Record your observations in your science journal with measurements and descriptions.

Question 1 of 3

What type of rock forms from compressed sediment?

How sure are you?😐 maybe

Question 2 of 3

What is sediment?

How sure are you?😐 maybe

Question 3 of 3

What is the rock cycle?

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: Weather Is Not Climate All lessons

🎯

Next Smart Experiment

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

✨ 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?”

🌦️Share card

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How Deposition Builds Land

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