Earth science is a multidisciplinary field that focuses on studying the physical and chemical processes that shape the Earth. This includes studying the planet's atmosphere, hydrosphere, geosphere, and biosphere. Earth scientists investigate a wide range of topics, including climate change, natural disasters, the formation of mountains and oceans, and the evolution of life on Earth. By studying these processes, researchers aim to better understand the Earth's past, present, and future, as well as how human activities are impacting the planet.