3. Describe how Earth’s biosphere cycles water over and over.
Water evaporates then forms clouds turns to rain and runs off to surface water and evaporates again. Answer
Use the circle graph to answer the following questions. nitrogen oxygen Water vapor 0.0 to 4.0 pct. 21 pct 78 pct
4. About what percent of Earth’s atmosphere does water vapor make up? 0.0 to 4.0 percent Answer
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
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.