Many trees lose their leaves in the fall. Scientists have measured atmospheric carbon dioxide and found there to be seasonal changes. The highest levels of carbon dioxide were found in the month of May and lowest in October in the Northern Hemisphere. How does photosynthesis effect carbon dioxide seasonal changes seen here?(2 points) Responses More photosynthesis occurs in the summer, removing carbon dioxide from air making fall lowest level More photosynthesis occurs in the summer, removing carbon dioxide from air making fall lowest level More photosynthesis occurs in the spring so there will be less carbon dioxide in May More photosynthesis occurs in the spring so there will be less carbon dioxide in May Less photosynthesis in the fall and winter so there will be less carbon dioxide in May.

Answer 1

The correct response to explain the seasonal changes in carbon dioxide levels is:

More photosynthesis occurs in the summer, removing carbon dioxide from the air, making fall the lowest level.

In the Northern Hemisphere, during the spring and summer months, trees and other plants actively perform photosynthesis, which absorbs CO2 from the atmosphere. As a result, CO2 levels decrease during these months. By the fall, when photosynthesis slows down and trees start to lose their leaves, there is less removal of CO2 from the atmosphere, contributing to the higher levels observed in that time frame, particularly in May when photosynthesis is at its peak.