15. Use the circle graph to answer the following questions. nitrogen oxygen Water vapor 0.0 to 4.0 pct. 21 pct 78 pct
16. 4. About what percent of Earth’s atmosphere does water vapor make up? 0.0 to 4.0 percent Answer
17. State the effects that would result in the following situations. 5. If farming area allowed no pesticides, what are 2 effects you might see? Answer Crops might suffer more damage from insects, but the soil and water would be less polluted. Essay
18. State the effects that would result in the following situations. Essay 6. Explain how air pollution and land pollution can cause water pollution. Answer Rain can wash air pollution into water, air pollutants can drift into water, and rain can wash land pollutants into water.
Editor's Notes
Answer D) Condenses into clouds
2. Water pollution can be caused by pesticides and______ used on farms.
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