Answer:
The answer is B, Cooler materials are highly dense, causing them to sink to the outer core.
Explanation:
Answer:
Doppler effect is a change in frequency and wavelength of a wave. It is caused by the change in distance between the thing creating the wave (causer) and whatever is measuring seeing or hearing the wave (watcher or observer). Another word for "causer" is "sender".
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Answer:
True
Explanation:
Because Bio means life, and diversity means the different species in one area.
