Students perform several tests on liquids. In this general science activity, students compare the properties of polymeric and nonpolymeric liquids. They explain the composition and importance of macromolecules.

Students examine a potential asteroid impact site. They describe evidence and theories for extinction events.

Students practice bleaching recycled fibers. Using colored copy paper, they cut it into strips and put it in a blender with water. They filter the pulp and stir in the bleach. They compare the original paper with the bleached sample...