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What I Know (Pre-Test) Directions: Choose the letter of the best answer Write the chosen letter on a separate sheet of paper. 1. The tropic levels best describe as: A. who eats who B. hierarchy of energy transfer C. structured 'eeding relationship D. All of the above 2. Plants are also known as A heteroses C. autotrophs B. herbivores D. omnivores 3. What is the main source of energy in the ecosystem? A. Carbon C. Water B. sunlight D. Nitrogen 4. Producers are A. plants C. fungi B. animals D. bacteria 5. Plants convert sunlight into energy through A. radiation C. expiration B. transpiration D. photosynthesis 6. It is a cycle betweer the nonliving environment and living organisms, as well. Carbon dioxide in the air or dissolved in water is used by photosynthesizing plants, algae, and bacteria as a raw material to build organic molecules. A. Water cycle C. Nitrogen cycle B. Carbon cycle D. Biogeochemical cycle 7 What do you call this process that are able to convert the nitrogen gas (N2) that enters the soil into ammonia (NH3) that plants can use? A. Nitrogen cycle C. Nitrogen fixing bacteria B. Decomposers D. Carbon cycle 8. are organisms that prey on and eat other animals. A. Carnivores C. Herbivores B. Omnivores D. All of the above 9. It is a process that after passing through a plant, the water moves into the atmosphere by evaporating from the leaves. C. Infiltration A. Transpiration D. Water vapor B. evaporation 10. An organism that cannot make its own food C. Autotroph A. Heterotrop D. Producer B. Bacteria
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