Question

carbon and oxygen cycle
sunlight
co₂ in atmosphere
organic carbon
dead organisms and
waste in the ground

Explanation:

To solve the problem of filling in the blanks in the carbon and oxygen cycle diagram, we analyze each component:

Step 1: Identify the process with sunlight

The box with sunlight input and connection to trees/grass (organic carbon) is Photosynthesis. During photosynthesis, plants use sunlight, \( \ce{CO_2} \) (from atmosphere), and water to produce glucose (organic carbon) and \( \ce{O_2} \).

Step 2: Identify the process related to the sheep (animal)

The box connected to the sheep (and \( \ce{CO_2} \) release) is Respiration. Animals (and plants) perform cellular respiration, breaking down organic carbon to release energy, \( \ce{CO_2} \), and water.

Step 3: Identify the process related to factories

The box connected to factories (and \( \ce{CO_2} \) release) is Combustion. Burning fossil fuels (or biomass) in factories releases \( \ce{CO_2} \) into the atmosphere.

Step 4: Identify the process related to dead organisms in the ground

The box connected to dead organisms/waste is Decomposition (or Fossil Fuel Formation). Decomposers break down dead matter, or over long periods, dead organisms can form fossil fuels (coal, oil, gas) underground.

Filled Diagram Explanations (Key Boxes):

• Top - left box (sunlight + \( \ce{CO_2} \) → organic carbon): Photosynthesis (plants use light to fix \( \ce{CO_2} \) into organic compounds).
• Middle box (sheep → \( \ce{CO_2} \)): Respiration (animals respire, releasing \( \ce{CO_2} \)).
• Middle - right box (factories → \( \ce{CO_2} \)): Combustion (burning fuels in industry releases \( \ce{CO_2} \)).
• Bottom box (dead organisms → ...): Decomposition/Fossil Fuel Formation (decomposers break down matter, or organic matter becomes fossil fuels over time).

(Note: If the diagram has specific labels, adjust based on arrows. For example, the “dead organisms and waste in the ground” arrow points to a box that could be “Fossil Fuels” or “Decomposers (releasing \( \ce{CO_2} \))”, but the most common completion for a carbon - oxygen cycle is:

1. Photosynthesis (uses \( \ce{CO_2} \), makes organic carbon, needs sunlight).
2. Respiration (releases \( \ce{CO_2} \) from organic carbon in animals/plants).
3. Combustion (releases \( \ce{CO_2} \) from burning fossil fuels/fuels in factories).
4. Decomposition (decomposers break down dead matter, releasing \( \ce{CO_2} \) or forming fossil fuels).)

Answer:

To solve the problem of filling in the blanks in the carbon and oxygen cycle diagram, we analyze each component:

Step 1: Identify the process with sunlight

The box with sunlight input and connection to trees/grass (organic carbon) is Photosynthesis. During photosynthesis, plants use sunlight, \( \ce{CO_2} \) (from atmosphere), and water to produce glucose (organic carbon) and \( \ce{O_2} \).

Step 2: Identify the process related to the sheep (animal)

The box connected to the sheep (and \( \ce{CO_2} \) release) is Respiration. Animals (and plants) perform cellular respiration, breaking down organic carbon to release energy, \( \ce{CO_2} \), and water.

Step 3: Identify the process related to factories

The box connected to factories (and \( \ce{CO_2} \) release) is Combustion. Burning fossil fuels (or biomass) in factories releases \( \ce{CO_2} \) into the atmosphere.

Step 4: Identify the process related to dead organisms in the ground

The box connected to dead organisms/waste is Decomposition (or Fossil Fuel Formation). Decomposers break down dead matter, or over long periods, dead organisms can form fossil fuels (coal, oil, gas) underground.

Filled Diagram Explanations (Key Boxes):

• Top - left box (sunlight + \( \ce{CO_2} \) → organic carbon): Photosynthesis (plants use light to fix \( \ce{CO_2} \) into organic compounds).
• Middle box (sheep → \( \ce{CO_2} \)): Respiration (animals respire, releasing \( \ce{CO_2} \)).
• Middle - right box (factories → \( \ce{CO_2} \)): Combustion (burning fuels in industry releases \( \ce{CO_2} \)).
• Bottom box (dead organisms → ...): Decomposition/Fossil Fuel Formation (decomposers break down matter, or organic matter becomes fossil fuels over time).

(Note: If the diagram has specific labels, adjust based on arrows. For example, the “dead organisms and waste in the ground” arrow points to a box that could be “Fossil Fuels” or “Decomposers (releasing \( \ce{CO_2} \))”, but the most common completion for a carbon - oxygen cycle is:

1. Photosynthesis (uses \( \ce{CO_2} \), makes organic carbon, needs sunlight).
2. Respiration (releases \( \ce{CO_2} \) from organic carbon in animals/plants).
3. Combustion (releases \( \ce{CO_2} \) from burning fossil fuels/fuels in factories).
4. Decomposition (decomposers break down dead matter, releasing \( \ce{CO_2} \) or forming fossil fuels).)