Unit 2 Water and Weather - Spokane Public Schools
Unit 2 Water and Weather - Spokane Public Schools
Unit 2 Water and Weather - Spokane Public Schools
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5.1 Section Review1. What are the two main gases in Earth’s atmosphere?2. Why is nitrogen an important element for sustaining life?3. Give one reason why life exists on Earth <strong>and</strong> not on otherplanets.4. How are these two things related: the White Cliffs of Dover<strong>and</strong> the gasoline you put in your car?5. As a person moves higher above sea level, how does:a. the density of air molecules change?b. the atmospheric pressure change?6. Mountain climbers who try to reach the summit of MountEverest carry oxygen tanks. Why do you think they do this?7. What does the term altitude mean?8. Indicate where you would find higher water pressure <strong>and</strong>lower water pressure in Figure 5.8. Explain your answer.9. In Earth’s atmosphere <strong>and</strong> even under water, molecules presson objects. What prevents the human body <strong>and</strong> a deep-sea fishfrom being crushed by all this pressure?10. How does an aneroid barometer work?11. Convert an atmospheric pressure of 2 atmospheres to:a. inches of mercury (in Hg)b. barsImagine that you are a sciencewriter at a local newspaper. Eachweek, readers ask questions <strong>and</strong>you try to answer them. Here’s thisweek’s question:Why do my ears sometimes hurt<strong>and</strong> “pop” during airplanetakeoffs <strong>and</strong> l<strong>and</strong>ings?Research <strong>and</strong> then answer thequestion. Remember, you areresponding to a reader of yournewspaper, so begin with “Dearreader,” <strong>and</strong> make your responseinteresting!Figure 5.8: Question 8.104UNIT 2 WATER AND WEATHER
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