Layers of the Earth

What You'll Learn

Earth has three main layers: the thin outer crust, the thick mantle, and the dense core. The core has a liquid outer layer and a solid inner layer made mostly of iron.

Key Words

humidity
barometer
anemometer

Steps

Step 1 — Read

Read and learn: Earth has three main layers: the thin outer crust, the thick mantle, and the dense core. The core has a liquid outer layer and a solid inner layer made mostly of iron.

Step 2 — Do

Gather your materials and set up your workspace.

Step 3 — Observe

Watch carefully for any changes and note the time.

Step 4 — Record

Create a data table to organize your measurements.

Check Your Understanding

Question 1

1 of 3

What causes earthquakes?