Lesson 10 of 15 · Earth Systems

Experiment⭐ 30 XP🌋 Rock Realm

What Causes Ocean Tides

🧪Lab Brief #10

Earth Systems.

🎯 Your mission

Set it up. Test it. Be amazed.

⚡ The twist

The slowest changes are the biggest ones.

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Mind = Blown

🪨 Every grain of sand on every beach used to be a mountain.

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Make a hypothesis first

Predict: which will erode faster?

What You'll Learn

Tides are the daily rise and fall of ocean water caused mainly by the Moon's gravity pulling on Earth. Most coasts experience two high tides and two low tides each day as Earth rotates.

Key Words

Tap a word to see its definition.

Materials Needed

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.

Steps

Step 1 — Read

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

Step 2 — 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 — Observe

Look for patterns in your observations.

Step 4 — Record

Make a graph or chart showing your results.

Check Your Understanding

Question 1

1 of 3

What causes wind?

How sure are you going to be?😐 maybe

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Where you see this in real life

This is shaping the ground you walk on, slowly, every single day.

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Stretch Challenge

Try this in real life this week.

Find a rock outside and try to guess how old it is.

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For the dinner table

“What's the slowest change you can think of?”

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