1.
A) CME's B) Sunspots C) Clusters D) Solar flares 2.
A) Earth's rotation B) Earth's tilted axis C) the changing weather D) the distance between Earth and the sun 3.
A) 200,000 to 500,000 years B) 60,000 to 100,000 years C) 1,000 to 5,000 years D) 10,000 to 15,000 years 4.
A) cooler, humid B) warmer, cloudier C) cooler, warmer D) warmer, cooler 5.
A) postglacial periods B) interglacial periods C) antiglacial periods D) midglacial periods 6.
A) air pressure B) humidity C) vegetation D) precipitation 7.
A) close to the sun B) tilted toward the sun C) farther away from the sun D) tilted away from the sun 8.
A) latitude B) longitude C) landform D) climate 9.
A) movement of Earth's crustal plates B) meteorite collision C) forest fires D) volcanic eruption 10.
A) coral bleaching B) increased global temperatures C) increased flooding D) melting glaciers 11.
A) strong storms B) rainstorms C) snow D) drought 12.
A) a plant's spiny leaves to prevent water loss B) fur on animals to protect from cold C) a plant's waxy texture to prevent evaporation D) hibernation 13.
A) Columbia B) Iceland C) Thailand D) The United States 14.
A) plants B) weather C) sun D) rain 15.
A) always bad for the environment B) in perfect amount on Earth C) necessary to keep Earth warm D) beneficial in large amounts 16.
A) increasing tourism B) providing leisure activities C) absorbing or giving off heat D) causing the region to experience inhospitable conditions 17.
A) Deserts, leeward B) Rainstorms, leeward C) Deserts, windward D) Heat storms, windward 18.
A) because cool air rises and warm air falls B) The equator receives the most direct sunlight. C) Scientists are still unsure. D) because all currents, warm and cool, begin near the equator 19.
A) adaptation B) deforestation C) hibernation D) extinction 20.
A) heat B) precipitation C) heat and precipitation D) small particles of dust
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