An exploration of how food travels through the human digestive system, from the mouth to the large intestine, and how the body extracts nutrients and energy. • 20 questions

An exploration of solids, liquids, and gases, how their particles behave, and how energy causes them to change states through melting, freezing, boiling, and condensation. • 20 questions

This topic explores how energy from the sun moves through producers, consumers, and decomposers, forming food chains and food webs that connect all living things in an ecosystem. • 20 questions