Seventh graders explore how disease prevention and treatment changed throughout history. In this life science instructional activity, 7th graders create a classroom exhibit about this topic. They present their project to visitors.

The heat of solution measures how much thermal energy a dissolving substance consumes or gives off. The experiment demonstrates both endothermic and exothermic reactions. Scholars dissolve several substances, measure the temperature...

Classify seeds by attributes such as size, shape and color! Learners classify seeds using a dichotomous key. They identify human behaviors that have a positive impact on preserving seed and plant biodiversity.

Explore the function of enzymes through a series of lab investigations. Learners use household enzymes such as hydrogen peroxide to model the role of enzymes. The enzymes break down proteins with and without a catalyst.

Students brainstorm and share opinions about products that can be reused or recycled after reading the article, "Seattle's Recycling Success Is Being Measured in Scraps." They then investigate, analyze and evaluate articles on recycling...