Q. 1. The lowermost layer of the atmosphere is, (a). troposphere (b). ionosphere (c). stratosphere (d). exosphere Q. 2. The most prominent gases in the atmosphere in terms of volume are (a). nitrogen and oxygen (b). nitrogen and oxygen (c). oxygen and carbon dioxide (d). hydrogen and nitrogen Q. 3. The weather phenomenon takes place in (a). stratosphere (b). troposphere (c). exosphere (d). ionosphere Q. 4. Which layer of the atmosphere maintains an almost uniform temperature? (a). troposphere (b). exosphere (c). stratosphere (d). ionosphere Q. 5. Which gas in the atmosphere absorbs ultraviolet rays? (a). methane (b). nitrogen (c). ozone (d). helium Q. 6. Which layer of the atmosphere contains electrically charged particles called ions which are best suited for wireless communication? (a). stratosphere (b). ionosphere (c). exosphere (d). troposphere Q. 7. Which layer of the atmosphere is rich in ozone
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