Science 2A explores how questions and science are related, ecosystems, water and conservation and forces. In Unit 1, students review what facts and opinions are and how to ask a good question. They will learn how to do an experiment. In Unit 2, ecosystems are introduced and students learn about living and non-living parts of an ecosystem. Biomes, food chains and food webs are also discussed in this unit. In Unit 3, water and conservation are reviewed and how water is a basic need for life on Earth. Different types of bodies of water are introduced and the water cycle is discussed. Watersheds are covered and students learn what watershed they live in. In Unit 4, students learn what a force is and what the different kinds of force there are. Students learn how force affects objects on Earth. Each unit has some hands-on activities and assignments to complete to help students to understand the concepts of this course.