Layers of the Earth science worksheet for Grade 3 students.

Let’s solve this step by step.

We are given a diagram of Earth’s layers and four labels to place:
mantle, inner core, crust, outer core

Looking at the diagram (from outermost to innermost):

1. The very thin outer layer — that’s where we live → crust
2. Below the crust is a thick middle layer → mantle
3. Then comes a liquid-like layer surrounding the center → outer core
4. The very center, solid and hottest → inner core

So, matching the arrows from outside in:

- Outermost arrow → crust
- Next arrow inward → mantle
- Next → outer core
- Innermost → inner core

Now answer the questions:

1. Which layer do we live on? → We live on the crust.
2. Which layer generates Earth’s magnetic field? → That’s the outer core (because it’s made of moving molten metal).
3. Which layer is the hottest? → The inner core (even though it’s solid, it’s under extreme pressure and heat).
4. On which layer does the crust float? → The crust floats on the mantle (specifically the upper part called the asthenosphere, but for this level, “mantle” is correct).

Final Answer:

Labeling the layers (from outermost to innermost):
→ crust
→ mantle
→ outer core
→ inner core

Answers to questions:
Which layer do we live on? → crust
Which layer generates Earth’s magnetic field? → outer core
Which layer is the hottest? → inner core
On which layer does the crust float? → mantle