Earth Science Review worksheet with diagrams and questions about Earth's layers and tectonic plates.

Let’s go step by step through each question.

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Question 1: Which layer exists as a collection of tectonic plates?

Tectonic plates are large, rigid pieces of the Earth’s outer shell that move slowly over time. These plates are made up of the crust and the very top part of the mantle — together, this is called the lithosphere.

- Outer core → too deep, liquid metal
- Mantle → mostly solid but flows slowly; not broken into plates
- Asthenosphere → soft, flowing layer under lithosphere; allows plates to move
- Lithosphere → YES! This is the rigid outer layer broken into tectonic plates

✔ Correct answer: B. lithosphere

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Question 2: This layer is divided into two: the inner and outer.

Looking at the diagram (even though we don’t describe it), we know from Earth science that the core is split into:
- Inner core (solid)
- Outer core (liquid)

Crust and mantle are not divided into “inner and outer” in standard teaching.

✔ Correct answer: C. Core

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Question 3: The layer is divided into two: the continental and oceanic.

This refers to the crust:
- Continental crust → thicker, under landmasses
- Oceanic crust → thinner, under oceans

Mantle and core are not described this way.

✔ Correct answer: B. Crust

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Question 4: The layer below the crust is the ________.

From inside out, Earth’s layers are:
1. Inner core
2. Outer core
3. Mantle
4. Crust ← outermost

So directly below the crust is the mantle.

Even if the diagram shows labels, basic knowledge tells us: crust → then mantle → then core.

✔ Correct answer: mantle

*(Note: Since no multiple choice options are shown for Q4 in your image snippet, but based on standard curriculum and context, “mantle” is correct. If options were given like A) Core B) Mantle C) Asthenosphere — still B would be best direct answer.)*

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Final Answer:

1. B
2. C
3. B
4. mantle