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20 Cards in this Set
- Front
- Back
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what is the main difference between energy flow and material/matter flow on earth
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-energy flow is open
-material flow occurs in cycles; matter is fixed on earth |
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where are the largest fluxes in the water cycle
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over the ocean
evaporation and precipitation |
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where is the largest pool in the water cycle
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ocean
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what is the main difference between energy flow and material/matter flow on earth
|
-energy flow is open
-material flow occurs in cycles; matter is fixed on earth |
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what are the 2 largest pools on long in the water cycle
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ice
ground water |
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what are the two largest fluxes on land in water cycle
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ET is larger than flux of freshwater to ocean
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how much freshwater human use is used for agriculture
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80%
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where are the largest fluxes in the water cycle
|
over the ocean
evaporation and precipitation |
|
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where is the largest pool in the water cycle
|
ocean
|
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what significant about ground water to humans
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-it makes up 50% of our fresh water use
-it is being severely depleted b/c its turnover rate is very slow |
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what are the 2 largest pools on long in the water cycle
|
ice
ground water |
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describe the nitrogen cycle
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N2 makes up 78% of our atmosphere, but N2 is not usable by many plants
-microbes or bacteria fix N2 into inorganic forms (NH4, NO3) that are usable by plants -these inorganic forms are then converted back to N2 via denitrification |
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what are the two largest fluxes on land in water cycle
|
ET is larger than flux of freshwater to ocean
|
|
|
how much freshwater human use is used for agriculture
|
80%
|
|
|
what significant about ground water to humans
|
-it makes up 50% of our fresh water use
-it is being severely depleted b/c its turnover rate is very slow |
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is nitrogen a limiting nutrient?
why? |
yes
-N2 is not usable by plants. plants rely on microbes/bacteria to convert N2 into usable inorganic forms of nitrogen |
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describe the nitrogen cycle
|
N2 makes up 78% of our atmosphere, but N2 is not usable by many plants
-microbes or bacteria fix N2 into inorganic forms (NH4, NO3) that are usable by plants -these inorganic forms are then converted back to N2 via denitrification |
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where is most of carbon stored on earth?
-how did it get there |
-fossil fuels, carbonate rock (underground)
-trees take in carbon from the atmosphere and store it underground |
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is nitrogen a limiting nutrient?
why? |
yes
-N2 is not usable by plants. plants rely on microbes/bacteria to convert N2 into usable inorganic forms of nitrogen |
|
|
where is most of carbon stored on earth?
-how did it get there |
-fossil fuels, carbonate rock (underground)
-trees take in carbon from the atmosphere and store it underground |
