Earth's atmosphere is made of gasses, some dust, and water. What we have on earth that helps us live that isn't found on other planets. On the earth we have many things that help us live. First, we have water on earth, if we didn't have water we couldn't live. Then we have air.
Seasons are groups of changes in a year.
There are our seasons. One is fall, winter, spring, and summer. They last around three months in a year. Day changes to night, because the sun lights the side of the earth that faces it. If the earth did not spin one half of the world would stay light forever and the other half would stay dark forever.