How to explain the size and heat of the sun at noon and morning in the debate between two children? Simply put.

It's big in the morning and small at noon, which is because of atmospheric refraction, that is, the refractive index is high just after the horizon, and it is very small when the sunlight passes through the atmosphere almost vertically at noon; It is cold in the morning and hot at noon, because the earth is not heated by the sun for a long time in the morning and the temperature is low. By noon, the sun has been shining on the earth for several hours, and the temperature of the earth will definitely rise.