Here is a complete activity in which young biologists or ecologists test the pH, dissolved oxygen, turbidity and temperature of stream water. The class visits an actual stream and makes observations of the site. They use scientific...

Students identify the factors affecting friction. In this physics lesson, students construct their own rocket car and race them. They graph the average speeds and discuss how lubricants affect friction between rubbing surfaces.

Students examine the organic and inorganic components of soil. In this environmental science lesson plan, students identify the factors that influence soil formation. They collect soil samples, conduct tests, and analyze the results.

Seventh graders create plans for an energy efficient addition to the school. They work in small groups with each group having responsibility for examining one aspect of the problem. They create working diagrams and a model of their...