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1. It can be concluded that a concentration of carbon dioxide in the atmosphere would______.
A) prevent the sun's rays from reaching the earth's surface
B) mean a warming up in the Arctic
C) cause great climate changes in the northern hemisphere
D) raise the temperature of the earth's surface
2.The article was written io explain____________.
A) the greenhouse effect.
B) che sola:r effects on the earth.
C) the models of solar-weather interactions.
D) the causes affecting weather.
3.Why is the fuel consumption greater in the northern hemisphere. but temperatures there seem to be falling?
A) Mainly because the levels of carbon dioxide are rising.
B) Possibly because the ice caps in the poles are melting.
C) Because the inertia of the earth's climate take effect.
D) Partly because the output of solar energy varies.
4.On the basis of their models. scientists are of the opinion that_______.
A) the climate of the world should be becoming cooler
B) it will take thousands of years for the inertia of the earth's climate to take effect
C) the man-made warming effect helps to increase the solar effects
D) the new Ice Age will be delayed by the greenhouse effect
5.If the assumption about the delayof a new Ice Age is correct,___________.
A) the best way to overcome the cooling effect would be to burn more fuels
B) ice would soon cover the northern hemisphere
C) the increased levels of carbon dioxide could warm up the earth quickly.
D) the greenhouse effect could work to the advantage of the earth.
