We learned that Earth’s carbon is stored in reservoirs in each Earth system. Although only a small amount of carbon dioxide is stored in the atmosphere, this gas affects Earth’s climate. Most carbon on Earth is stored in the geosphere. Human activities, including burning fossil fuels and cutting down forests, have led to an increase in the gas carbon dioxide in Earth’s atmosphere. Carbon dioxide is one of several greenhouse gases in the atmosphere that absorb and reradiate thermal energy from the Sun. An increase in greenhouse gases can cause global warming, possibly leading to coastal flooding and harmful changes in habitats. We learned about the study of Earth science which is the study of Earth and its place in the universe. Earth science has several branches including geology, oceanography, meteorology, astronomy, and environmental science. Then we learned that matter and energy constantly move from one part of the Earth system to another. Next we learned that there are forces that have changed Earth’s surface throughout its history. The constructive forces shape Earth’s surface by building mountains and Land masses. The destructive forces slowly wear away mountains and every other feature on Earth’s surface.