Theory of Plate Tectonics Worksheet Review online exercise for ... - Free Printable

Let's solve this step-by-step based on the Theory of Plate Tectonics.

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Part 1: Multiple Choice Questions

1. Earth’s crust and upper mantle are broken into sections called _____
- a. lava
- b. plates

✔ Correct answer: b. plates
> Explanation: The lithosphere (crust + upper mantle) is broken into large pieces called tectonic plates.

2. The collision of one continental plate with another may produce _____
- a. oceans
- b. mountains

✔ Correct answer: b. mountains
> Explanation: When two continental plates collide, they crumple and uplift to form mountain ranges, like the Himalayas.

3. New ocean crust is formed at a _____
- a. rift valley
- b. mid-ocean ridge

✔ Correct answer: b. mid-ocean ridge
> Explanation: At mid-ocean ridges, magma rises from the mantle, cools, and forms new oceanic crust as plates move apart.

4. A rift valley can form where two continental plates are _____
- a. moving apart
- b. colliding

✔ Correct answer: a. moving apart
> Explanation: When continental plates pull apart, the crust stretches and breaks, forming a rift valley (e.g., East African Rift).

5. Where Earth’s plates move, they may slide alongside one another, pull apart, or _____
- a. collide
- b. divide

✔ Correct answer: a. collide
> Explanation: The three main types of plate boundaries are: divergent (pull apart), convergent (collide), and transform (slide past). So "collide" is correct.

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Part 2: Concept Map

We are given these terms to use:
- mid-ocean ridges
- volcanic islands
- major earthquakes
- rift valleys
- deep-sea trenches
- volcanic mountains

Now let's fill in the concept map:

#### Plate boundaries include:
- Convergent → forms: deep-sea trenches, volcanic mountains, volcanic islands
- Divergent → forms: mid-ocean ridges, rift valleys
- Transform → causes: major earthquakes

So now we label the blanks:

6. → One of the features formed at convergent boundaries
→ deep-sea trenches

7. → Another feature formed at convergent boundaries
→ volcanic mountains

8. → Third feature formed at convergent boundaries
→ volcanic islands

> Note: Convergent boundaries can form all three: trenches (when oceanic plates subduct), volcanic mountains (when continental plates collide), and volcanic islands (when oceanic plates subduct and magma rises).

9. → What divergent boundaries form
→ mid-ocean ridges

10. → Another thing divergent boundaries form
→ rift valleys

11. → What transform boundaries cause
→ major earthquakes

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✔ Final Answers:

Multiple Choice:
1. b
2. b
3. b
4. a
5. a

Concept Map:
6. deep-sea trenches
7. volcanic mountains
8. volcanic islands
9. mid-ocean ridges
10. rift valleys
11. major earthquakes

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🔍 Summary Explanation:

- Convergent boundaries: Plates collide → form trenches, volcanic mountains, or islands.
- Divergent boundaries: Plates pull apart → form mid-ocean ridges (underwater) or rift valleys (on land).
- Transform boundaries: Plates slide past each other → cause earthquakes due to friction and stress.

This reflects the core ideas of plate tectonics: movement of plates leads to formation of geological features and natural events like earthquakes and volcanoes.

Let me know if you'd like a diagram version!