Question

biogeochemical cycles
for numbers 67 - 78 write the letter that best matches the term in the space provided:
term description

1. transpiration a. co₂ enters plants during this process.
2. precipitation b. absorption of nitrogen by plants.
3. nitrogen fixation c. the burning of fossil fuels.
4. assimilation d. process in which bacteria combine nitrogen with hydrogen to form ammonia in the soil.
5. denitrification e. a cycle in which a substance enters a living organism for a time then returns to the nonliving environment.
6. fossil fuels f. the evaporation of water from the leaves of plants.
7. combustion g. rain or snow.
8. erosion h. carbon - based materials made of decayed plants and animals - used for fuel.
9. respiration i. bacteria convert nitrogen - based compounds into nitrogen gas.
10. photosynthesis j. vaporized water forms clouds during this process.
11. biogeochemical cycle k. the breakdown of limestone; returns co₂ to the water.
12. condensation l. exhaling co₂ and returning it into the atmosphere.
13. in biogeochemical cycles, elements and molecules are cycled through ____ and ____ things. provide an example:
14. why are plants and bacteria crucial for the nitrogen cycle?
15. what role does combustion play in global warming?

Explanation:

1. Transpiration is the evaporation of water from the leaves of plants, so it matches f.
2. Precipitation is rain or snow, so it matches g.
3. Nitrogen - fixation is the process in which bacteria combine nitrogen with hydrogen to form ammonia in the soil, so it matches d.
4. Assimilation is the absorption of nitrogen by plants, so it matches b.
5. Denitrification is when bacteria convert nitrogen - based compounds into nitrogen gas, so it matches i.
6. Fossil fuels are carbon - based materials made of decayed plants and animals used for fuel, so it matches h.
7. Combustion is the burning of fossil fuels, so it matches c.
8. Erosion is not accurately defined in the given options.
9. Respiration is exhaling CO₂ and returning it into the atmosphere, so it matches l.
10. Photosynthesis is when CO₂ enters plants during this process, so it matches a.
11. Biogeochemical Cycle is a cycle in which a substance enters a living organism for a time then returns to the non - living environment, so it matches e.
12. Condensation is when vaporized water forms clouds during this process, so it matches j.
13. In biogeochemical cycles, elements and molecules are cycled through living and non - living things. Example: the carbon cycle where carbon moves between plants, animals, the atmosphere and soil.
14. Plants are crucial for the nitrogen cycle because they absorb nitrogen compounds from the soil for growth. Bacteria are important as they perform nitrogen - fixation (convert atmospheric nitrogen to a usable form) and denitrification.
15. Combustion of fossil fuels releases large amounts of carbon dioxide into the atmosphere. Carbon dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, contributing to global warming.

Answer:

1. f
2. g
3. d
4. b
5. i
6. h
7. c
8. No correct match in options
9. l
10. a
11. e
12. j
13. living; non - living; carbon cycle
14. Plants absorb nitrogen compounds, bacteria perform nitrogen - fixation and denitrification.
15. Releases CO₂, a greenhouse gas that contributes to global warming.