It's obvious when you consider how much longer the days are in Summer.
Things generally expand and become less dense when they get warm due to the increase in molecular motion. This expansion can lead to changes in volume, shape, or state of matter, depending on the material.
because warm molecules have more energy and movement and either rise when warm or expand if they're warm or surrounded by warmness.
Because heat makes things expand, and cold makes things contract.("'\(o.o)/"')
When things warm up their size increases. An example of this is the oceans. Global warming is warming the oceans, so they expand and sea levels rise, threatening low-lying countries.
EXPAND.
Because the particles
all things are made of molecules, when molecules are hot or warm, they expand quicker, when they are cooled they tend to clump together.
They expand.
Things which keep warm things warm and cold things cold are referred to as insulators.
Expand generally means to expand the problem. I'm assuming this is a function, you'd expand it into a simpler form (factor things out and such).
Water expands at the equator due to the centrifugal force caused by the Earth's rotation. This force effectively bulges the water in that region, resulting in a slightly larger volume compared to water at the poles.
I would say that it is more down to physics than geography: Everything warm tries to expand, when it can't expand, it builds up pressure inside. So: the warmer the air, the higher the air pressure.