Why does the angular velocity of the earth around the sun increases as it comes closer to sun.

It indicates no change in temperature and the process of matter changing its state

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

You would need to take a picture so i can see