In the Northern Hemisphere, climate scientists observe seasonal changes in carbon dioxide concentration with the highest levels measured in May and the lowest levels measured in October. Hypothesize how photosynthesis can affect these changes. Explain your answer in three to five sentences.

Question

(Remember: 1. Leaves, in the Northern Hemisphere, appear on trees in the Spring and fall from trees in the Autumn. 2. Leaves are where photosynthesis occurs. 3. How does
photosynthesis effect carbon dioxide?)

Answer 1

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose and release oxygen. During the spring and summer months, when leaves appear on trees, there is an abundance of green foliage actively performing photosynthesis. This means that there is a high demand for carbon dioxide. As a result, carbon dioxide levels in the atmosphere decrease. Conversely, in the fall, leaves start to fall from trees, reducing the surface area available for photosynthesis. This leads to a decrease in photosynthesis activity and a buildup of carbon dioxide in the atmosphere. Thus, photosynthesis directly affects the seasonal changes in carbon dioxide concentration in the Northern Hemisphere.