Question

In water heat travels up much faster than it travels down explain

Answer 1

When there is heat at the bottom of water, the water molecules that are hot starts to move, thus the water molecules spread apart. The heated water becomes less dense.

The less density water molecules rise to the top where it can find water with same density.

In this process, it pushes the other water molecules that were in its way. These molecules are pushed down.

At the same time, new water molecules fill the space left by the heated molecules that rose up. This brings a circular motion. Thus water heated at the bottom travels up, cools down, gets denser, falls down. The cycle continues.

Answer 2

Heat is scientifically explained as movement and vibrations of the molecules and atoms of the water. Thus, when water is heated, the water molecules and atoms need more space, because they vibrate more. Since the same number of molecules of water need more space, they become lighter than the molecules of water which are cold,and more packed together. If you heat the water from top with a small immersion heater, you will notice that bottom water remains cold, it is heavier than the water on top. Even ice may form on top, but below in the ocean water remains as it is, because water at 4 deg. C. is heavier than ice. thus fishes can live below.