Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Chapter 2 Test Review 7 TH G R A D E 2013-2014 1 Which answer best describes the Earth’s atmosphere? a. Mostly nitrogen with about 21% carbon dioxide b. Mostly carbon dioxide with about 21% oxygen c. Mostly nitrogen with about 21% oxygen Answer c. Mostly nitrogen with about 21% oxygen 2 What causes differences in air temperatures at different altitudes? Answer Mainly the way gases absorb solar energy 3 How much energy radiated by the sun reaches Earth? a. About 80% b. About 50% c. About two-billionths d. About one one-hundreths 4 One reason for global warming may be A. decreasing global gases Increasing global gases Increasing greenhouse gases Decreasing greenhouse gases Answer C. Increasing greenhouse gases 5 What causes wind? a. Differences in air pressure b. Differences in gravity c. Differences in oxygen d. Differences in the thermosphere answer a. Differences in air pressure 6 What causes differences in air pressure around the Earth? a. Warm air rises at the equator and cold air sinks at the poles b. Warm air sinks at the equator and cold air rises at the poles c. Warm air rises at the equator and cold air rises at the poles Answer a. Warm air rises at the equator and cold air sinks at the poles 7 \Local winds are produced by Answer Local geographic features 8 Mountain and valley breezes are caused by a. Differences in temperature and elevation b. Similarities in temperature and elevation c. The same temperature at all elevations d. High temperatures at all elevations Answer A. differences in temperature and elevation 9 Why is air pressure greatest at the Earth’s surface? Answer Gravity pulls the molecules toward the surface Things To Know Radiation thermal conduction Convection greenhouse effect Radiation balance convection cells Coriolis Effect trade winds Polar easterlies jet stream Atmosphere ozone Westerlies doldrums