Working in pairs, students will create experimental conditions in terrariums in order to study what plants need to live. Variables to study include the presence or absence of soil, water, and sunlight. Students will record the growth of radish... (View More) plants as well as observations of "the water cycle" in their terrariums. At the conclusion of their experiments, students will share their results with the class and discuss how water, Earth materials, and air are all necessary to support living things. The activities use commonly-available or inexpensive materials (e.g., chart paper, clear soda bottles, potting soil, radish seeds, paper towels, water, tape, foil, and index cards). This is the first of three sets of learning activities that are companion activities to the Elementary GLOBE children's book, All About Earth: Our World on Stage. Includes a teacher implementation guide. GLOBE (Global Learning and Observation to Benefit the Environment) is a worldwide, hands-on, K-12 school-based science education program. (View Less)