in An Inconvenient Truth a graph of atmospheric carbon dioxide shows a regular decrease in te amount of the gas once a year what time of year does this happen
1. winter and spring in the northern hemisphere
2. spring and summer in the north hemisphere
3. fall and winter in the north hemisphere
4. summer and fall in the north hemisphere
The correct answer is option 1. Winter and spring in the northern hemisphere. In An Inconvenient Truth, the graph of atmospheric carbon dioxide shows a regular decrease in the amount of the gas during these seasons in the northern hemisphere.
The correct answer is option 1. Winter and spring in the northern hemisphere. In the graph shown in "An Inconvenient Truth," the regular decrease in atmospheric carbon dioxide occurs during the winter and spring months in the northern hemisphere.
To determine when the regular decrease in atmospheric carbon dioxide occurs in An Inconvenient Truth, we need to understand the seasonal variations in the Northern Hemisphere.
Typically, carbon dioxide levels tend to decrease during periods of intense plant growth and photosynthesis, when plants absorb carbon dioxide for photosynthetic processes. Based on this, we can narrow down the options:
1. Winter and spring in the Northern Hemisphere: During the winter, many plants become dormant and photosynthesis rates decrease. Thus, it is unlikely that carbon dioxide levels would decrease during this time.
2. Spring and summer in the Northern Hemisphere: During spring and summer, plants in the Northern Hemisphere go through rapid growth and increase their carbon dioxide absorption through photosynthesis. This makes it more plausible that carbon dioxide levels would decrease during this period.
3. Fall and winter in the Northern Hemisphere: Similar to option 1, during fall and winter, plant activity decreases and photosynthesis rates are low, making it unlikely for carbon dioxide levels to decrease.
4. Summer and fall in the Northern Hemisphere: As mentioned earlier, the summer season is characterized by high plant growth and photosynthesis rates. As a result, it is reasonable to expect that carbon dioxide levels would decrease during this time.
Based on this analysis, the most likely answer is option 4: summer and fall in the Northern Hemisphere.