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When pressure from the heat of the Earth builds up, what will be formed? A. mountain
B. tsunami
7. What causes the molten rock or magma to come out of a giant crack on the Earth's surface?
B. tidal wave
C. fault lines а
8. What do you call the magma from a volcano when it flows on the surface of the Earth?
B. gas
C. ash
9. Which of the following is a beneficial effect of volcanic eruption?
A. damaged properties
C. loss of lives
10. How did the eruption of Mt. Pinatubo in 1991 change the Earth's surface?
B. Nothing changed on the Earth's surface after the eruption.
C. Areas surrounding Mt. Pinatubo became an ocean.