Question

why does the sun rays heat up the bottom of the pool before the top layer of the water? ​

Answer 1

Explanation:

The sunlight is transmitted by the water only enough to heat lower levels a little bit. ... Since water near the surface is less dense than water near the bottom, the water circulates, bringing the solar-heated water of the surface down into the body of water and heating the lower levels.

Answer 2

Answer:

The sunlight is transmitted by the water only enough to heat lower levels a little bit. ... Since water near the surface is less dense than water near the bottom, the water circulates, bringing the solar-heated water of the surface down into the body of water and heating the lower levels.