1. When seismic waves passes through the mantle, waves decrease down. This means that ______.
A. mantle is solid
B. mantle is liquid
C. mantle is semi-liquid
D. mantle is hard
2. Which of the following is/are true about tsunamis?
A. it is related to tides
B. it is due to the upward movement of rock at the seafloor
C. it is a giant tidal wave
D. it is due to the upward movemebt of rock on land
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Answer:
1. (C) mantel is semi liquid
2.(D) option D is false , A,B,C are true
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