The greenhouse effect is a process that occurs when gases in Earth’s atmosphere trap the sun’s heat. This process makes Earth much warmer than it would be without an atmosphere. Click here to learn more about the greenhouse effect and climate change.

To help us better understand the greenhouse effect, my fourth grade scientists planted sunflower seeds in their mini greenhouses. We will also see the water cycle in action as the water evaporates, condenses, and falls again. Then we explored air pressure in several fun investigations.