Question

part 2. work in a small group to complete the table below. then pair - share with a partner.
formulaic expressions
student 1:
statement # 1 says “________”.
i agree/disagree with this because________
so, im going to mark agree/disagree.
what do you think?
student 2:
i agree/disagree with you beca
so, for statement #1, i will mar
now, statement # 2 says “_____

statements

1. carbon is stored in the earth’s biosphere, geosphere and hydrosphere

☑ i agree
○ i disagree
because carbon exists

1. carbon sinks are places that release more carbon than they store

○ i agree
○ i disagree

1. during photosynthesis, plants release carbon in the atmosphere

○ i agree
○ i disagree

1. raising cattle for food is an example of a carbon source

○ i agree
○ i disagree

1. the amount of carbon dioxide in the atmosphere has been stable

○ i agree
i disagree

Explanation:

To solve this, we analyze each statement based on carbon cycle knowledge:

Statement 1

• Explanation: The biosphere (living organisms), geosphere (e.g., rocks, soil), and hydrosphere (water bodies) all store carbon (e.g., plants in biosphere, fossil fuels in geosphere, dissolved CO₂ in oceans).
• Agree/Disagree: I agree.

Statement 2

• Explanation: A carbon sink stores more carbon than it releases (e.g., forests, oceans). The statement says sinks release more than they store, which is incorrect.
• Agree/Disagree: I disagree.

Statement 3

• Explanation: Photosynthesis uses CO₂ from the atmosphere to make glucose, so plants absorb (not release) carbon during photosynthesis.
• Agree/Disagree: I disagree.

Statement 4

• Explanation: Cattle produce methane (a carbon - containing gas) and release CO₂ during respiration, so raising cattle is a carbon source.
• Agree/Disagree: I agree.

Statement 5

• Explanation: Human activities (burning fossil fuels, deforestation) have increased atmospheric CO₂, so its amount is not stable.
• Agree/Disagree: I disagree.

Filling the Table (Example for Pair - Share)

Statements	I agree / I disagree	Evidence from text/knowledge
2. Carbon sinks are places that release more carbon than they store	I disagree	Carbon sinks (e.g., forests, oceans) absorb/stores more carbon than they emit.
3. During photosynthesis, plants release carbon in the atmosphere	I disagree	Photosynthesis: \(6CO_2 + 6H_2O \xrightarrow[\text{Chlorophyll}]{\text{Sunlight}} C_6H_{12}O_6 + 6O_2\) (absorbs \(CO_2\)).
4. Raising cattle for food is an example of a carbon source	I agree	Cattle respire (release \(CO_2\)) and produce methane, adding carbon to the atmosphere.
5. The amount of carbon dioxide in the atmosphere has been stable	I disagree	Human activities (fossil fuel burning, deforestation) have increased atmospheric \(CO_2\) over time.

For the “Formulaic Expressions” section (student dialogue):

• Student 1 (Statement 1): “Statement #1 says ‘Carbon is stored in the Earth’s biosphere, geosphere and hydrosphere’. I agree with this because carbon is found in living things (biosphere), rocks/fossil fuels (geosphere), and dissolved in water (hydrosphere). So, I’m going to mark agree. What do you think?”
• Student 2 (Response to Statement 1): “I agree with you because the carbon cycle shows carbon storage in these spheres. So, for statement #1, I will mark agree.”

(Repeat a similar structure for other statements, adjusting the reasoning based on each statement’s accuracy.)

Answer:

To solve this, we analyze each statement based on carbon cycle knowledge:

Statement 1

• Explanation: The biosphere (living organisms), geosphere (e.g., rocks, soil), and hydrosphere (water bodies) all store carbon (e.g., plants in biosphere, fossil fuels in geosphere, dissolved CO₂ in oceans).
• Agree/Disagree: I agree.

Statement 2

• Explanation: A carbon sink stores more carbon than it releases (e.g., forests, oceans). The statement says sinks release more than they store, which is incorrect.
• Agree/Disagree: I disagree.

Statement 3

• Explanation: Photosynthesis uses CO₂ from the atmosphere to make glucose, so plants absorb (not release) carbon during photosynthesis.
• Agree/Disagree: I disagree.

Statement 4

• Explanation: Cattle produce methane (a carbon - containing gas) and release CO₂ during respiration, so raising cattle is a carbon source.
• Agree/Disagree: I agree.

Statement 5

• Explanation: Human activities (burning fossil fuels, deforestation) have increased atmospheric CO₂, so its amount is not stable.
• Agree/Disagree: I disagree.

Filling the Table (Example for Pair - Share)

Statements	I agree / I disagree	Evidence from text/knowledge
2. Carbon sinks are places that release more carbon than they store	I disagree	Carbon sinks (e.g., forests, oceans) absorb/stores more carbon than they emit.
3. During photosynthesis, plants release carbon in the atmosphere	I disagree	Photosynthesis: \(6CO_2 + 6H_2O \xrightarrow[\text{Chlorophyll}]{\text{Sunlight}} C_6H_{12}O_6 + 6O_2\) (absorbs \(CO_2\)).
4. Raising cattle for food is an example of a carbon source	I agree	Cattle respire (release \(CO_2\)) and produce methane, adding carbon to the atmosphere.
5. The amount of carbon dioxide in the atmosphere has been stable	I disagree	Human activities (fossil fuel burning, deforestation) have increased atmospheric \(CO_2\) over time.

For the “Formulaic Expressions” section (student dialogue):

• Student 1 (Statement 1): “Statement #1 says ‘Carbon is stored in the Earth’s biosphere, geosphere and hydrosphere’. I agree with this because carbon is found in living things (biosphere), rocks/fossil fuels (geosphere), and dissolved in water (hydrosphere). So, I’m going to mark agree. What do you think?”
• Student 2 (Response to Statement 1): “I agree with you because the carbon cycle shows carbon storage in these spheres. So, for statement #1, I will mark agree.”

(Repeat a similar structure for other statements, adjusting the reasoning based on each statement’s accuracy.)