Lesson 1: Earth Systems and Interactions – We learned that Earth has small systems that interact with each other: the atmosphere, the hydrosphere, the geosphere, the biosphere and the cryosphere. The atmosphere is a layer of gases and particles of matter that surround Earth. Earth’s water forms the system called the hydrosphere, most of which is on the planet’s surface. Earth’s largest system is called the geosphere, which is mainly solid rock covered in many places by a thin layer of soil. The biosphere is the Earth system that contains all the living things on the planet.
Assignment: Add definitions for carbon cycle, greenhouse gases, and phosphorus cycle to science notebook.