Students recognize the presence of organic matter in soils from their immediate area and recognize which soil sample contains the highest concentration of organic matter.

For this photosynthesis worksheet, students use a textbook to research the different scientists involved in the discovery of the process of photosynthesis. This worksheet has 31 fill in the blank questions.

Middle schoolers examine the role of carbon in the oceans and how phytoplankton determine the levels present. In groups, they practice measuring primary productivity using two methods. They use the internet to research the role of...

Second graders gain an understanding of how plants produce oxygen and that the oxygen we breathe comes from trees and plants. After a lecture/demo, 2nd graders discuss the ways plants produce oxygen and the detrimental effects of cutting...

This site from the Department of Chemistry at the Washington University provides a deetailed study of the role of hemoglobin in blood physiology. The article is somewhat in-depth, complete with pictures, charts, and a bibliography.

[Free Registration/Login may be required to access all resource tools.] Do you know why oxygen is so important? Module provides a comparison of the advantages and disadvantages of aerobic and anaerobic respiration and discusses the role...

Explore the science of breathing.

This hazardous materials sign is to warn of potentially dangerous oxygen in the area.