Which term describes the systems of continuous water movement on and in the earth?
a. precipitation cycle
b. erosion cycle
c. hydrologic cycle
d. vapor cycle

Based on the food chain below, if a bald eagle acquires 50 kg of energy, how much energy did the herbivorous duck get from the aquatic vegetation? aquatic vegetation herbivorous duck bivalves sea ducks bald eagle 500 kg 5,000 kg 50,000 kg 500,000 kg