Washington DC Standards
DC.5.4. Earth Science: Broad Concept: Water on Earth moves from the ocean to the land through the processes of evaporation and condensation. As a basis for understanding this concept, students:
5.4.2. Explain how water moves in air masses from one place to another in the form of clouds, fog, or as invisible water vapor and falls to the Earth as rain, hail, sleet, or snow.
5.4.3. Describe that clouds are made of tiny droplets of water or ice crystals.
5.4.4. Explain that the air around us is matter and has weight (a force) and exerts pressure; explain that air pressure varies a little from place to place and from time to time.
5.4.5. Describe that winds blow from areas of higher pressure to areas of lower pressure.