Question

In liquids 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