1) Which of the following is a form of carbon? a) Diamonds b) Coal c) Graphite d) All of the above 2) Do phytoplankton skeletons contain calcium carbonate? a) Yes b) No 3) Water is always moving from Earth to the atmosphere? a) True b) False 4) Animals can have dna without nitrogen a) False b) True 5) Proteins don't contain nitrogen a) True b) False 6) What is the first step in the water cycle? a) Precipitation b) Transpiration c) Evaporation d) Condensation e) There is no first step, it's a cycle 7) Plants can have as much nitrogen as they want without having any problems. a) True b) False 8) How do phytoplankton become carbon? a) Through waste b) Drowning c) Getting burned d) Death 9) During transpiration do the leaves release evaporated water or liquid water? a) Liquid water b) Evaporated water c) Oil 10) Humans contribute to the carbon cycle. a) False b) True 11) New water forms when it reaches the clouds. a) True b) False 12) Humans damage the water cycle. a) True b) False 13) What is the chemical compound of carbon dioxide? a) CO 2 b) H2O c) N 2 14) What is the chemical compound of calcium carbonate? (baking soda) a) CH2N2 b) C6 H12 O6 c) CA2 CO3 15) What is precipitation? a) When the water turns hot and turns into gas b) When we sweat c) When rain, hail, sleet, and snow falls from the clouds. 16) What is condensation? a) When water vapor turns into liquid b) When liquid turns into water vapor c) When rain falls from the sky 17) What is evaporation? a) When rain falls from the sky b) When water vapor turns into liquid c) When liquid turns into water vapor 18) What would typically eat producers? a) Other producers b) Consumers c) Decomposers 19) What do decomposers eat? a) Dead plants b) Animals c) Carnivores d) Nothing 20) Energy increases as it goes up in the trophic level. a) True b) False

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