1) How much cooler does the air get for every 1 km increase in altitude in the troposphere? a. 2 degrees b. 6.5 degrees c. 8 degrees d. 10 degrees
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2) Which of the following is produced when electrical discharges pass through oxygen in the air? a. chlorofluorocarbons b. methane c. ozone d. lead compounds
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3) What is the source of lead compounds? a. aerosol sprays foams b. exhaust fumes of motor vehicles c. incomplete burning of wood d. none of above
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4) The atmosphere is divided into how many layers? a. two b. three c. four d. five
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5) How much higher can be the temperature inside a greenhouse as compared to the outside? a. 20 °C higher b. 10 °C to 15 °C higher c. 5 °C higher d. 25 °C higher
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6) The outer layer of the thermosphere is a. ionosphere b. exosphere c. mesosphere d. stratosphere
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7) Minimum temperature of the troposphere is a. 17 °C b. −55 °C c. −5 °C d. 1800 °C
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8) The temperature of the outer mesosphere is a. 93 °C b. −93 °C c. 5 °C d. −5 °C
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9) If silk clothes are left in the open air for a week or so, their color fades because of a. sulphur dioxide is converted into sulphur trioxide b. dirt c. carbon monoxide d. nitrogen oxides
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10) Height of thermosphere is a. 50 Km b. 80 Km c. above 80 Km d. 30 Km
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