Check your knowledge! DIRECTIONS: A. Answer the questions carefully. 1. What are the two major pollutants that are most common in the atmosphere? a. Ash and carbon monoxide b. Ash and carbon dioxide c. Particulates and ash d. Particulates and carbon dioxide _ 2. Which of these greenhouse gases are most abundant in the atmosphere? a Carbon dioxide b. Nitrous oxide c. Methane d. Water vapor _3. The atmospheric concentration of carbon dioxide in never more than 1 percent and may lead to a. global warming b. ice melts c. increase rainfall d. increase temperature 4. Increasing atmospheric concentrations of. deforestation may enhance the greenhouse effect and lead to global warming. a. Argon b. Carbon Dioxide c. Methane d. Radon 5. Scientist have been able to determine the atmospheric carbon dioxide concentrations due to human activities such as for hundreds of thousands of years in the past by using a. Tree rings b. written agricultural records. c. Computer simulations d. Bubble trapped in ice sheets.

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