cycling of carbon on earth
gary is studying the cycling of carbon on earth. he learns that scientists refer to the carbon cycle as two processes: the biocycle (fast) and the geocycle (slow).
the biocycle involves the cycling of carbon due to organisms and the processes of photosynthesis, cellular respiration, and decomposition. the biocycle is considered \fast\ because the cycle may take several days to tens of thousands of years, which is fast when compared to the geocycle.
the geocycle takes several millions of years, so it is considered \slow\. carbon dioxide is removed from the atmosphere when it dissolves in water and forms a weak acid called carbonic acid. carbonic acid chemically weathers surface rock, which releases carbon - containing ions, calcium ions, and other ions into surface water. these substances eventually make their way into the ocean. marine organisms like coral and shellfish use these substances to form calcium carbonate for making some of their physical structures. over time, layers of sedimentary rock called limestone form on the sea floor as the result of the buildup of dead marine organisms. when oceanic crust is subducted during tectonic plate movement, carbon that was stored in limestone is released as carbon dioxide during volcanic eruptions. the geocycle is represented in the diagram shown below.
(diagram: shows the geocycle process including co₂ in the atmosphere, co₂ mixing with water vapor to form carbonic acid, carbonic acid weathering rock to form calcium carbonate as limestone, and co₂ reaching the atmosphere through volcanoes and cracks in the rock)
use the drop - down menus to complete the explanation for how feedback in the geocycle stabilizes global temperatures when mountain building due to uplift is taking place on earth.
when mountain building occurs on earth’s surface, more rock becomes available for chemical weathering. this causes drop - down 1 carbon dioxide to be pulled out of the atmosphere. this change in atmospheric co₂ concentration causes global temperatures to drop - down 2. this change in global temperatures causes the rate of chemical weathering to drop - down 3, thereby pulling drop - down 4 co₂ from the atmosphere and causing global temperatures to drop - down 5.

Question

Accepted Answer

# Brief Explanations:
To solve the fill - in - the - blanks about the carbon cycle feedback:
1. When mountain building happens, more rock is available for chemical weathering. Chemical weathering (using carbonic acid formed from $CO_2$ and water) pulls $CO_2$ from the atmosphere. So the first blank (for the amount of $CO_2$ pulled out) should be "more" as more rock means more weathering and more $CO_2$ removal.
2. A decrease in atmospheric $CO_2$ (a greenhouse gas) will cause global temperatures to "decrease" because $CO_2$ traps heat.
3. Lower global temperatures initially would cause the rate of chemical weathering to "decrease" (since chemical reactions are slower at lower temps). But wait, no—wait, the feedback: when $CO_2$ decreases, temp decreases, but then, if temp decreases, weathering rate decreases, so less $CO_2$ is removed. But in the initial step, after mountain building, more weathering (more $CO_2$ removal) → lower temp → lower weathering rate → less $CO_2$ removal → temp can increase? Wait, no, let's re - track.

Wait, the first part: Mountain building → more rock for weathering → more chemical weathering (using $CO_2$ to form carbonic acid) → more $CO_2$ pulled from atmosphere. So first drop - down (after "This causes ___ carbon dioxide to be pulled..."): "more".

Then, lower atmospheric $CO_2$ → global temperatures "decrease" (since $CO_2$ is a greenhouse gas).

Then, lower global temperatures → rate of chemical weathering "decrease" (because chemical reactions speed up with higher temp).

Then, lower weathering rate → less $CO_2$ pulled from atmosphere. Wait, no, the last part: the change in global temperatures (after the first decrease) causes the rate of chemical weathering to... Wait, maybe I messed up. Let's start over.

1. Mountain building → more rock exposed → more chemical weathering. Chemical weathering uses $CO_2$ (from $CO_2 + H_2O=H_2CO_3$) to weather rock. So more weathering → more $CO_2$ removed from atmosphere. So first blank: "more".

2. Less atmospheric $CO_2$ → less greenhouse effect → global temperatures "decrease".

3. Lower global temperatures → chemical weathering rate "decrease" (because chemical reactions are temperature - dependent; lower temp means slower reactions).

4. Lower weathering rate → less $CO_2$ pulled from atmosphere. Wait, but the last blank: "thereby pulling ___ $CO_2$ from the atmosphere and causing global temperatures to...". Wait, no, the feedback loop: when temp decreases, weathering rate decreases, so less $CO_2$ is removed. So the fourth blank (for $CO_2$ pulled) is "less", and then global temperatures would "increase" (because less $CO_2$ is being removed, so $CO_2$ can build up again, or the feedback corrects? Wait, maybe the intended answers are:

First drop - down (amount of $CO_2$ pulled): more

Second (global temp change): decrease

Third (weathering rate change): decrease

Fourth ( $CO_2$ pulled): less

Fifth (global temp change): increase

But let's confirm the concepts:

- Chemical weathering of rock (using carbonic acid, $H_2CO_3$ from $CO_2 + H_2O$) removes $CO_2$ from the atmosphere. More rock (from mountain building) means more weathering, so more $CO_2$ removal (first blank: more).

- $CO_2$ is a greenhouse gas; less $CO_2$ → less heat trapped → lower global temp (second blank: decrease).

- Chemical weathering rate is temperature - dependent; lower temp → slower weathering (third blank: decrease).

- Slower weathering → less $CO_2$ removed from atmosphere (fourth blank: less).

- Less $CO_2$ removal → $CO_2$ in atmosphere can increase, so global temp increases (fifth blank: increase).

# Answer:
1. more
2. decrease
3. decrease
4. less
5. increase

(Assuming the drop - downs are in the order: first for $CO_2$ pulled, second for temp, third for weathering rate, fourth for $CO_2$ pulled, fifth for temp)

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Answer: