Why are there seasons on earth? A lot of people think that the reason is because of the distance the earth is from the sun - the farther the distance between the two, the colder it is. Well, that is actually not the case. During the coldest time of year, the earth is actually a bit colder. What is the real reason? Look at these web sites to find out. You will use the powerpoint tutorial in the first site to learn powerpoint. As you go through that tutorial, work on a presentation explaining the reason for the seasons.