New York State Chemistry RegentsNew York State Earth Science Regents

 
Living Environment Regents June 2010 Question 08 PDF Print E-mail
Thursday, 26 May 2011 15:27
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Correct Answer: (1) size of polar ice caps

Global warming refers to the phenomenon characterized by the increase in the average temperature of the earth. The primary cause of global warming is the accumulation of greenhouse gases due to human activities such as deforestation and burning of fossil fuels. The increased temperature leads to the melting of ice caps. Thus, global warming contributed to the decrease in the sizes of polar ice caps.

Incorrect Answers:

(2) temperature of Earth

When global warming occurs, the temperature of the earth increases or the surrounding becomes hotter than the usual temperature.

(3) rate of species extinction

Since there is unusually high temperature during global warming, some species cannot adapt to the change of temperature. When the species fail to thrive and all of them are wiped out, the species become extinct. This leads to the increase (not decrease) of the rate of species extinction.

(4) rate of carbon dioxide production

The increase in the concentration of carbon dioxide in the atmosphere is a consequence of combustion of fossil fuels and burning large quantities of wood. The high concentration of carbon dioxide in the atmosphere causes interception and absorption of the reflected infrared radiation, rereflecting it back to the Earth. Thus, solar heat is retained inside the Earth's surface and atmosphere. This phenomenon is known as the greenhouse effect.

 

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