SSAT Reading Question 166: Answer and Explanation
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Question: 166
6. Which of the following statements is NOT true of tephra?
- A. It can range in size from tiny particles of ash to huge boulders.
- B. It can travel thousands of kilometers from a volcano.
- C. It can be found trapped in magma.
- D. Large tephra falls on or close to a volcano.
Correct Answer: C
Explanation:
C is correct. During a volcanic eruption, magma blasts into the air and breaks apart into pieces called tephra; thus choice E is true. As explained in the last paragraph, tephra can vary greatly in size (choice A), it can travel hundreds to thousands of kilometers downwind from a volcano (choice B), and large tephra typically falls back to the ground on or close to the volcano (choice D). Gases, not tephra, may be trapped in magma; therefore choice C is the only choice that is NOT true of tephra.