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Which choice lists the 2 gases that make up most of Earth’s atmosphere? 70% oxygen; 30% nitrogen

Which choice lists the 2 gases that make up most of Earth’s atmosphere? 70% oxygen; 30% nitrogen 78% oxygen; 21% carbon dioxide 78% nitrogen; 21% oxygen 70% oxygen; 20% carbon dioxide; 10% water vapor. Circle the choices that are TRUE as you CLIMB HIGHER (gain altitude) in the troposphere .

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Which choice lists the 2 gases that make up most of Earth’s atmosphere? 70% oxygen; 30% nitrogen

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  1. Which choice lists the 2 gases that make up most of Earth’s atmosphere? 70% oxygen; 30% nitrogen 78% oxygen; 21% carbon dioxide 78% nitrogen; 21% oxygen 70% oxygen; 20% carbon dioxide; 10% water vapor

  2. Circle the choices that are TRUE as you CLIMB HIGHER (gain altitude) in the troposphere. Air density increases Air pressure decreases Temperatures decrease Air density, pressure, and temperatures increase.

  3. Which choice best describes the source of heat in Earth’s atmosphere? The sun Heat from Earth’s surface Upper atmosphere layers are heated by the sun; lower layers heated by Earth. Upper atmosphere layers are heated by Earth; lower layers heated by the sun.

  4. Which choice lists the atmospheric layers in order from the ground  up? Troposphere, stratosphere, mesosphere, thermosphere Thermosphere, mesosphere, stratosphere, troposphere Mesosphere, stratosphere, thermosphere, troposphere Stratosphere, troposphere, mesosphere, thermosphere

  5. The boundary between layers is based on… Density differences Temperature trends Pressure trends Differences in air composition Name that layer! Location of the ozone layer. Windiest, meteors burn up

  6. Name that layer! • Contains the ionosphere where the aurora happen. • Greatest air pressure and density 10. Weather and clouds happen

  7. 11. If Earth was not tilted on its axis, how would temperatures vary from the latitude to the poles? • Temperatures would be the same at all latitudes all year – no seasons. • Temperatures would be warmest at the equator and get cooler toward poles, but wit h no seasonal variations. • Temperatures would be warmest at the equator and get cooler toward poles, but with intense seasonal variation (more pronounced winter, spring, summer, and fall). • The same as now, but even the equator would have seasons.

  8. 12. Circle the choices that are TRUE when the north pole points toward the sun. • It is summer in the northern hemisphere. • The polar zone is experiencing 6 months of night. • The sun’s perpendicular rays are in the southern hemisphere. • It is winter in the southern hemisphere

  9. 13. If Earth was not tilted, how would climate in Ramsey be different? • It would be dark for 6 months at a time. • It would be cooler than the tropics, but the same temperature all year. • It would be warmer than the tropics, but the same temperature all year. • Seasonal changes in weather would be more extreme.

  10. 14. If Earth was not tilted, then the sun’s perpendicular rays would hit the ________ all year • North pole • Tropic of Cancer • Equator • Tropic of Capricorn • South pole

  11. 15. Which choice is TRUE about vernal equinox? • It is first day of fall • The sun’s intense rays fall on the equator. • It is the longest day of the year. • It happens on June 21st

  12. 16. When the sun’s intense rays fall on the Tropic of Capricorn… • It is first day of fall • It is the first day of winter. • It is the longest day of the year. • It is vernal equinox.

  13. 17. Which choices would cause a COOLING on Earth? • Increase in greenhouse gases • Decrease in greenhouse gases • Reduction in polar ice caps. • Advance of polar ice caps.

  14. 18. How is Earth’s energy budget affected by melting ice caps? • More visible light is reflected, temperatures increase • More visible light is reflected, temperatures decrease. • Less visible light is reflected by surfaces, temperatures increase. • Less visible light is reflected, temperatures decrease.

  15. 19. The air is primarily heated by … • UV wavelengths from the sun. • Visible light and UV wavelengths from the sun. • Infrared wavelengths radiated from Earth’s surface. • All of the above.

  16. In this diagram, wind would blow from ______ to _______. This is called a _______ breeze. It happens in the (day/night). 72 F 52 F • Circle the choices that are TRUE about WARM air. • Dense • Low pressure • Sinks • Has room in it for moisture • If Earth did NOT rotate, global winds would … • Circle the equator • Move from equator to poles • Move from poles to equator • Have the same pattern they do now.

  17. 90 N 60 N 30 N 0 • Which zone shows where the WESTERLIES are located? • True or False? • It isvery windy at the equator. • 25. Rainy/snowy latitudes can be found at ______ and ______ degrees. C B A

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