Let’s solve this step by step.
We are looking at the Earth’s interior layers, starting from the top (Crust) and going down to the center. The diagram shows 4 layers total — we already have the first one filled in: Crust.
Now let’s fill in the next three layers based on what scientists know about Earth’s structure:
---
Layer 2 (just below the Crust):
This is called the
Mantle.
- It starts right after the crust ends (so around 70 km deep) and goes down to about 2,900 km.
- Even though it’s very hot, most of the mantle behaves like a solid over long periods — but it can slowly flow like thick honey. So its state of matter is usually described as
Solid (though sometimes “plastic” or “semi-solid” is used — for school level, “Solid” is fine).
→ Name: Mantle
→ Depth: 70–2900 km
→ State of Matter: Solid
---
Layer 3 (below the Mantle):
This is the
Outer Core.
- It starts at about 2,900 km and goes to 5,150 km deep.
- This layer is made mostly of iron and nickel, and because it’s so hot, it’s melted — so it’s
Liquid.
→ Name: Outer Core
→ Depth: 2900–5150 km
→ State of Matter: Liquid
---
Layer 4 (the very center):
This is the
Inner Core.
- From 5,150 km all the way to the center (about 6,371 km).
- Even though it’s hotter than the outer core, the pressure is so huge that the metal stays squeezed into a
Solid.
→ Name: Inner Core
→ Depth: 5150–6371 km
→ State of Matter: Solid
---
Final Answer:
Second box (from top):
Name: Mantle
Depth: 70–2900 km
State of Matter: Solid
Third box:
Name: Outer Core
Depth: 2900–5150 km
State of Matter: Liquid
Fourth box:
Name: Inner Core
Depth: 5150–6371 km
State of Matter: Solid
Parent Tip: Review the logic above to help your child master the concept of earth science worksheet pdf.
