Introduction to Dissolved Oxygen and Demonstration of a Simple Test Procedure
Pupils explain the importance of dissolved oxygen in water ecosystems. They describe the aquatic oxygen cycle and the effect of water pollution on oxygen. They make observations, collect data and draw a conclusion.
5th - 8th Science 3 Views 12 Downloads
Where’s the Water?: Acting Out Science Cycles
Young scientists transform themselves into rivers, oceans, clouds, and drops of water in order to explore the water cycle. After assigning and explaining to learners their different roles in the activity, the teacher reads aloud a...
2nd - 5th Science CCSS: Adaptable
Water Purification by Evaporation and Condensation
This easy-to-perform demonstration shows students how the water cycle, specifically the processes of condensation and evaporation, purifies Earth's water supply. Just mix up some water, dirt, and gravel in a glass bowl, place a cup in...
4th - 7th Science