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Natural Cycles and Energy Flow
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Natural Cycles and Energy Flow
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20 Questions

1. Scientists have studied the carbon cycle in all the following geochemical reservoirs except
2. When plants pull water from the soil, use the dissolved minerals to grow, and release the water back through the leaves, it is known as
3. When calcium carbonate is used to build the shells of sea creatures, it is called
4. A plant’s reaction that captures visible light wavelengths (0.4 to 0.7 µm) and transforms them into chemical energy is known as
5. Inorganic sulfur is found primarily in rock and minerals as iron pyrite and
6. Inorganic sulfur is found primarily in rock and minerals as iron pyrite and
7. All the following are natural water reservoirs except
8. Carbon-containing material from living or nonliving sources is called
9. A plant’s reaction that captures visible light wavelengths (0.4 to 0.7 µm) and transforms them into chemical energy is known as
10. The idea that matter is neither created, nor destroyed, but recycled through natural cycles is known as
11. When plants absorb carbon dioxide and sunlight to make glucose and build cellular structures, it is known as the
12. The residence time of oxygen in the atmosphere is
13. Matter exists in three forms: solid, liquid, and
14. When ammonia is taken up by plants, dissolved by water, or remains in the soil to be converted to nitrates, it is known as
15. The idea that matter is neither created, nor destroyed, but recycled through natural cycles is known as
16. Organisms that consume litter, debris, and dung are called
17. By dry weight, approximately what percent of carbon are humans composed of?
18. When freshwater has high concentrations of calcium and/or magnesium, it is commonly called
19. When calcium carbonate is used to build the shells of sea creatures, it is called
20. By dry weight, approximately what percent of carbon are humans composed of?

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