Cycles Review the water cycle CarbonOxygen Cycle Nitrogen

Cycles Review the water cycle Carbon-Oxygen Cycle Nitrogen Cycle

Carbon Cycle 1.

Carbon- Oxygen Cycle In the process of ______1____all organisms eventually release the carbon. In the process of ____2_______a consumer releases carbon. In the process of ______3______a producer acquires carbon dioxide. Autotrophs carry out ______4_____and release CO 2

Nitrogen Cycle Air is 78% nitrogen. Nitrogen is needed by all living things for protein production and body chemicals Problem- Organisms can’t get N from the air. Solution-Bacteria change N gas to a usable formprocess is called Nitrogen Fixation

Legumes Bacteria change N to nitrate that is absorbed by plants Organisms eat plants to obtain Nitrogen

To release N, bacteria break down waste and dead organisms. N returns to soil. Lightening changes some atmospheric N into usable N

Self quiz on carbon and nitrogen cycles Do you remember? ? True or False: Indicate whether each of the following statements is true or false. If the statement is false, rewrite it to make a true statement. F 1. Nitrogen gas makes up about 78% of our atmosphere. F 2. Both plants and animals are capable of using nitrogen directly from the atmosphere. 3. Carnivores (meat – eaters) receive the nitrogen they need by eating animals that feed on herbivores (plant - eaters). T T 4. Both consumers and producers release carbon dioxide into the atmosphere. 5. As producers perform photosynthesis, carbon dioxide is released into the F atmosphere. 6. Transpiration is the process by which plants release O 2 into the atmosphere. F