The document discusses the structure of the Earth and compares it to a hard boiled egg. It explains that the Earth has four main layers - the crust, mantle, outer core, and inner core. The crust is the solid outer layer made of rocky plates, the mantle is below the crust and made of molten rock, the outer core is very hot molten metal, and the inner core is solid metal. Cutting open a hard boiled egg reveals similarities to the Earth's layered structure.

1. 1. The Structure of the Earth

2. The Structure of the Earth
By the end of the lesson you should be able to:
• Identify the four main layers which make up the
structure of the Earth.
• Explain why a hard boiled egg is similar to the
structure of the Earth.

3. Crust
The outer layer of the Earth made
up of solidified rocky plates.
Mantle
The layer of molten rock on
the crust floats.
Outer core
made of very hot molten metal.
Inner core
made of solid metal
Key Terms

4. The Earth’s Structure
Can you think
what this image
has to do with
the Earth’s
structure?

5. Get Involved
1. Take a hard boiled Egg and
tap it gently with a spoon.
2. Carefully peel the cracked shell
from the egg.
Q: What does the surface of
the egg look like?
3. Cut egg in two.
Q: What does the inside of
the egg look like?

6. Understanding the Earth’s layers
The Earth is made up of many layers like the egg
Tectonic plates

7. Show what you have learned
1. Draw a cross section of the earth using different sized
circles for each layer.
2. Label each layer using the correct term
3. Use a different colour to shade each layer of the
Earth’s structure.
4. Explain why the structure of the earth is similar to an
egg.