8 of 148 of 14 Items
03:57
Feature
Carbon Cycle
Question 1
Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and respiration allow the carbon cycle to regenerate needed substances by recycling Earth's atoms. A diagram of the carbon cycle is shown. Each arrow represents a process in the cycle. Which explanation best describes the process that occurs at the arrow marked B?
Responses
A Plants use carbon dioxide from the atmosphere in the process of photosynthesis to produce glucose.Plants use carbon dioxide from the atmosphere in the process of photosynthesis to produce glucose.
B Plants release carbon dioxide into the atmosphere in the process of photosynthesis to produce glucose.Plants release carbon dioxide into the atmosphere in the process of photosynthesis to produce glucose.
C Plants use carbon dioxide from the atmosphere in the process of cellular respiration to convert glucose to ATP energy.Plants use carbon dioxide from the atmosphere in the process of cellular respiration to convert glucose to ATP energy.
D Plants release carbon dioxide into the atmosphere in the process of cellular respiration to convert glucose to ATP energy.Plants release carbon dioxide into the atmosphere in the process of cellular respiration to convert glucose to ATP energy.
Question 2
Deforestation has a crucial impact on the amount of carbon dioxide in the atmosphere. Which explanation best describes what is happening at the arrow marked A?
Responses
A When forests are cut down, carbon absorption slows or ceases due to less photosynthesis occurring.When forests are cut down, carbon absorption slows or ceases due to less photosynthesis occurring.
B When forests are cut down, carbon absorption slows or ceases due to less respiration occurring in plants.When forests are cut down, carbon absorption slows or ceases due to less respiration occurring in plants.
C Trees cutdown in deforestation are burned or left to rot causing additional carbon dioxide to be absorbed by the atmosphere.Trees cutdown in deforestation are burned or left to rot causing additional carbon dioxide to be absorbed by the atmosphere.
D Trees cut down in deforestation are burned or left to rot causing additional carbon dioxide to be released into the atmosphere.
Trees cut down in deforestation are burned or left to rot causing additional carbon dioxide to be released into the atmosphere.
Question 1: B. Plants release carbon dioxide into the atmosphere in the process of photosynthesis to produce glucose.
Question 2: A. When forests are cut down, carbon absorption slows or ceases due to less photosynthesis occurring.