1. The atmosphere is a larger carbon reservoir than the deep ocean 2. Which one
ID: 288357 • Letter: 1
Question
1.
The atmosphere is a larger carbon reservoir than the deep ocean
2.
Which one of these is a positive feedback?
Surface temperatures increase, oceans get warmer, oceans dissolve less CO2 from the atmosphere
Surface temperatures increase, oceans get warmer, oceans dissolve more CO2 from the atmosphere
Surface temperatures increase, oceans dissolve less CO2 from the atmosphere, Earth goes into runaway cooling and turns into Snowball Earth
3.
When plants photosynthesize, they
use nutrients and CO2 and produce oxygen
produce nutrients, CO2 and oxygen
produce nutrients and CO2 and use oxygen
use nutrients, CO2 and oxygen
4.
There are approximately 750 Pedagrams of carbon in the atmosphere. Now suppose that the amount of carbon in the atmosphere increases by 6 Pedagrams per year because of fossil fuel combustion and emissions. How many years will it take to double the total amount of atmospheric carbon?
62.5 years
125 years
250 years
4500 years
5.
Why are carbon dioxide concentrations measured at Mauna Loa, Hawaii, higher in Northern Hemisphere winter than in Northern Hemisphere summer?
There are more plants in the Southern Hemisphere than the Northern Hemisphere.
There is less photosynthesis in winter than in summer.
Decomposition rates are higher in the summer than in the winter.
There is no respiration in the ocean.
A True B FalseExplanation / Answer
1. False - The oceans absorb substantial amounts of carbon dioxide and thus the largest CO2 reservoir.
2. Surface temperatures increase, oceans get warmer, oceans dissolve less CO2 from the atmosphere. As the water temperature increases the solubility of CO2 decreases. And as soubility in the Ocean water decreases thus there will be more CO2 in the atmosphere and it will lead to higher temperature.
3. use nutrients and CO2 and produce oxygen. During photosynthesis plant use nutrients and CO2 and give Oxygen.
4. Currently it has 750 pedagrams. and it increases by 6 pedagrams per year. Thus to increase 750 pedagrams more it will take 750/6= 125 years. Thus in 125 years the amount of CO2 will double.
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