Question

how does sweating helps to keep our body cool on a hot day

Answer 1

Perspiration helps to keep our body cool on hot day because just like the water that comes out of the mud keeps the water inside it as it absorbs all the heatand makes the water cool . Their are many small wholes in our whole body (our body is porous) thewater that we drink comes out of these small holes and when the air touches the water droplets in the surface of our skin the water absorbs the heat on the surface of our skin and thus makes our body cool.

Answer 2

when we take air inside it is hot in summer ,so air goes in our muscles and sweat out and all hot goes and our body became cool