Mai Lesson
Earth's Secret Layers
Science · 30 min · Any age · You and your child together
This lesson uses everyday objects to explore the Earth's layers, temperature, and pressure deep within. Families will discover why digging to the other side of the Earth is an incredible, almost impossible, challenge.
What your child gets out of it
- Identify the main layers of the Earth (crust, mantle, core).
- Describe how temperature and pressure change with depth inside the Earth.
- Explain why a human cannot practically dig to the other side of the Earth.
What you need
- Apple or orange — A spherical fruit with distinct parts (skin, flesh, core) works best. (or Peach, Kiwi)
- Spoon or toothpick — Something to 'dig' with, safely. (or Small stick, Blunt straw)
- Small bowl (or Cup, Saucer)
- Warm water — Use water that is comfortably warm, not hot. From the tap is fine.
- Ice cube — From the freezer. (or Frozen pea, Chilled spoon)
- Sponge — Something soft that can be squeezed. (or Soft cloth, Wad of paper towels)
How it runs
- Breakfast Table Dig · 5 min
- Explore & Plan: The Grand Dig · 8 min
- Discussion: Earth's Incredible Layers · 6 min
- Activity: Feel the Earth's Extremes · 9 min
- Summary: An Impossible Journey? · 2 min
Why it matters
Geologists and geophysicists study seismic waves from earthquakes to 'see' inside the Earth, much like doctors use X-rays to see inside our bodies.
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