What are the three main layers of the Earth?
1. Crust
2. Mantle
3. Core
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Describe the Earth's crust.
The crust is made up of solid rock and is relatively thin.
Life exists on top of the crust, as it provides a surface for plants, animals, and humans to live on.
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Describe the mantle and explain why it can flow.
The mantle is made up of very hot, slowly flowing rock.
The rock is able to flow as the temperature and pressure increases deeper into the mantle.
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Describe the Earth's core.
The core is composed of iron and nickel.
It is very hot due to immense pressure.
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What are tectonic plates?
Tectonic plates are huge slab-like segments of the crust and upper mantle that fit together like pieces of a jigsaw puzzle, with oceans and continents atop them.
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Describe how tectonic plates move and the effect of their movements.
Tectonic plates slowly move across the mantle in different directions at speeds of a few centimetres a year.
The motion of tectonic plates can cause earthquakes and volcanic activity at plate boundaries.
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