Volcanoes Quiz 23 (20 MCQs)

Quiz Instructions

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1. What is molten (melted) rocks found deep in the earth called?

Correct Answer: B) Magma.

2. If lava flowed at the same speed as a glass of milk, we would say it has a ..... viscosity.

Correct Answer: B) Low.

3. What forms when hot water and steam are trapped underground in a narrow crack, get heated and erupt from the cracks?

Correct Answer: B) Geyser.

4. What does active mean?

Correct Answer: A) Busy.

5. Which volcanic eruptions destroy property, death or injury to humans rarely occurs

Correct Answer: B) Shield volcano.

6. These are formed by less viscous basaltic lava flows.

Correct Answer: B) Shield Volcanoes.

7. About 75 percent of the world's volcanoes are found

Correct Answer: C) Around the Pacific Ocean basin.

8. What is the topic of the paragraph on page 344 of "Volcanoes" ?

Correct Answer: C) Hot lava from volcanoes can cause damage.

9. Which type of volcano has recently erupted or will soon erupt?

Correct Answer: A) Active.

10. Eruption of Kavachi Volcano in the Solomon Islands in 2000 is an example of what type of volcanic eruption?

Correct Answer: B) Phreatomagmatic.

11. Molten rock outside the Earth's crust

Correct Answer: A) Lava.

12. Volcanoes further away from those close to a hotspot are .....

Correct Answer: A) Older.

13. Which of the following is a participating state of CDEMA?

Correct Answer: D) Turks and Caicos Islands.

14. Which of the following forms from large amounts of fluid lava over an extensive area?

Correct Answer: B) Lava Plateau.

15. Which type of lava has a high viscosity, is felsic, silica rich and has explosive eruptions?

Correct Answer: A) Rhyolitic Lava.

16. These are sometimes caused by the upward movement of magma before an eruption

Correct Answer: C) Earthquakes.

17. The solid particles thrown up in the air during a volcanic eruption are known as .....

Correct Answer: A) Tephra/pyroclastics.

18. When ash, cinders, and bombs build up in a steep pile around a volcano's vent, the result is a

Correct Answer: A) Cinder cone volcano.

19. Where are most volcanoes located?

Correct Answer: D) Ring of Fire.

20. What percentage of Earth's volcanoes are found in the Ring of Fire?

Correct Answer: D) 75%.