Answer:
A and B I took the test :)
Explanation:
B. B
C. C
D. D
Answer:
the answer is:
- almost 8 million.
Explanation:
i did the quiz.
Answer:
Scientists are able to understand Earth's interior by studying seismic waves.
Seismic waves travel at different speeds when they pass through different types of material, so by studying seismograms, scientists can learn a lot about Earth's internal structure.