A great review of the structure and function of carbon-based molecules important to life, especially with relevance to humans. The chemistry behind the combination of polymers and the breakdown of bonds is covered. Valuable content...

Osteoporosis has long been viewed as an "old ladies' disease," but there are many people at risk. There are also many things young people can do to reduce their risk factors. Learn about all of this and more through a comprehensive...

In this reading comprehension worksheet, students read a passage regarding different deserts and answer 10 questions. The questions are a mix of true/false, short answer, and matching.

Learners research information about pesticides. Students discuss the history of the Mexican fruit fly. They experiment to discover malathion concentration levels in organisms. Learners explore the effect of toxins at the top of the...

In this reproduction worksheet, learners identify the causes which contribute to secondary sex characteristics to develop. Then they determine when the adolescent growth spurt begins and ends for girls and for boys. Students also...

In this weather worksheet, students identify with the symbols found on a weather map that show the locations of fronts, high- and low-pressure areas, and various types of precipitation across the United States. Then they use the map...

Students explore kenaf, a tree-free paper. In this environmental issues lesson, students draw pictures following a presentation about the origin and "eco-friendly" nature of kenaf.