This challenging worksheet stretches first graders with science vocabulary they will meet again in second and third grade. Four multiple-choice questions ask what happens when the sun heats water, what we call vapor turning back into drops, where most of Earth's water collects, and which step makes rain or snow — pulling in evaporation, condensation, precipitation, and collection as choices. Five fill-in-the-blank sentences then reinforce that the sun powers evaporation, tiny drops form clouds, full clouds release rain, and water flows into rivers during collection.

Use this sheet as an end-of-unit check before introducing cloud types and storm vocabulary.