Earth Cycles The Carbon Cycle: Geology, biology, and the impact of human activities by John Arthur Harrison, Ph.D. Reading Quiz Teach with this 1. Carbon is a common component of limestone all organisms volcanic gases all of the choices 2. The geologic portion of the carbon cycle operates on a scale of days to months. true false 3. Photosynthesis is the process by which plants release CO2 to the atmosphere. turn CO2 into sugars. turn sugars into energy. none of the choices 4. Respiration is the process by which ____________ is consumed and _______________ is produced. carbon dioxide, oxygen carbon dioxide, energy oxygen, carbon dioxide energy, carbon dioxide 5. Regular, annual fluctuations in atmospheric carbon dioxide concentrations occur because photosynthesis stops at night while respiration continues humans influence the carbon dioxide concentrations. carbon dioxide emissions increase in the winter. plants in the northern hemisphere lose their leaves during the winter. 6. How does the concentration of carbon dioxide in the atmosphere affect climate? As carbon dioxide concentration increase, temperatures decrease. As carbon dioxide concentrations increase, temperatures increase. Carbon dioxide concentrations have no affect on climate. As carbon dioxide concentrations increase, temperatures become more random. 7. According to most scientists, activities like fossil fuel burning and deforestation have affected the global carbon cycle. true false 8. Which of the following processes does NOT add carbon to the atmosphere? volcanic eruptions respiration weathering of limestone subduction 9. Although direct measurements of atmospheric carbon dioxide have only been taken consistently since the 1950s, scientists have been able to retrieve data from the past 500,000 years. They have been able to do this by looking at ice cores from ice sheets sediment cores from the ocean tree rings all of the choices 10. A net carbon source is a carbon pool which takes in more carbon than it releases. true false Score Quiz
