Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 19

What happens to matter in an ecosystem? What is a biogeochemical cycle ( nutrient cycle )? Describe the hydrologic ( water ) cycle , and distinguish among evaporation , transpiration , and precipitation. Describe the carbon , nitrogen , and phosphorus cycles , and explain how human activities are affecting each cycle.