Question

in research stations around the world, such as the mauna loa observatory in hawaii, scientists measure the amount of co₂ in earths atmosphere. for many years, scientists have observed that the amount of co₂ in earths atmosphere rises and falls at different times of the year. this happens mainly because the amount of photosynthesis taking place on earth changes with the seasons. the majority of earths trees are located in the northern hemisphere and most of them grow much more slowly in december, january, and february. complete the sentences. when it’s summer in the northern hemisphere, the majority of earth’s trees grow much more. there is photosynthesis happening during these months. so, the amount of co₂ in earth’s atmosphere.

Explanation:

When it's summer in the northern hemisphere, trees grow more. Since photosynthesis is related to tree growth (trees use CO₂ in photosynthesis), more growth means more photosynthesis. More photosynthesis consumes more CO₂, so the amount of CO₂ in the atmosphere falls.

Answer:

When it's summer in the northern hemisphere, the majority of Earth's trees grow much more quickly. There is more photosynthesis happening during these months. So, the amount of CO₂ in Earth's atmosphere falls.