Curated OER
How Trees Contribute to the Water Cycle
For this water cycle instructional activity, 3rd graders conduct an experiment where they observe and calculate how water transpires in different types of trees. Students engage in a class discussion and use Venn Diagrams to compare...
Curated OER
The No Zone of Ozone
Students explore the causes and effects of the Earth's ozone holes through discussion and an interactive simulation. Using gumdrops and toothpicks, they conduct a large-group, interactive ozone depletion model.