This document provides an overview of different topics in earth science. It discusses the four main branches of earth science as meteorology, astronomy, geology, and oceanography. It also provides descriptions of specific topics within those branches, such as the study of the atmosphere and weather in meteorology and the study of the ocean in oceanography. It compares and contrasts astronomy and meteorology. Additionally, it discusses tools used in meteorology like weather balloons and satellites. Finally, it touches on topics in earth science like the structure of the earth's crust consisting of plates and the percentage of the earth covered by water.