Are all areas of Earth equally heated by the Sun? Explain your answer. What happens to the density of water when it is warmed?
What happens to the density of water when it is cooled?
What happens as water heated in warmer places around the world rises?

No, due to the spherical shape of the earth the sun is farther away from areas near the top and bottom of the earth while the center gets the most heat.

When water is heated it expands and volume increases. The more space it takes up the lower it’s density is.