Question

why does density of different layers increase with depth​

Answer 1

HELLO FRIEND

Explanation:
As you go deeper in depth, pressure increases. Density = mass/volume. The layers beneath us due to pressure get packed to the point of being very dense.

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Answer 2

less denser is higher

Explanation:

substance with less density floats on substance with higher density so less dense substance lies at the top and the densest substance lies lower