Multiple Choice Encircle the letter of the correct answer. 1. The main difference between the water cycle and all the other biogeochemical cycles is that water_ a creates completely new substances b. is made fdm matter that has been here since the world was formed c. never changes its structural farm d. is much slower than the other cycles 2. How does carbon dioxide leave the atmosphere? a through transpiration c. through factory emission b. through photosynthesis d. sunlight 3. Which process takes Carbon Dioxide from the air and converts it into a form of carbon used by living things? a precipitation c. photosynthesis b. respiration d. bioremediation 4. The energy that drives the water cycle comes from a solar radiation c. geothermal heat b. water energy d. advection is consumed and 5. Respiration is the process by which is produced a Carbon, Oxygen b. H20, Oxygen c. Oxygen, Carbon dioxide d. Carbon, H20 a 6. Converting atmospheric nitrogen into a usable form by bacteria or lightning is known as a nitrogen fixation c. denitrification b. ammonification d. assimilation 7. Which of the following statements about the nitrogen cycle is false? a nitrogen can be used from the air b. nitrogen can be fixed by lightning or bacteria c. nitrogen is used to make proteins in the human body d. nitrogen can be released back into the air or the ground after an organism dies 8. Which of the following is released by the weathering of rocks? a Carbon c. Oxygen b. Phosphorus d. Nitrogen