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WorksheetsECOLOGY
Total questions: 10
Worksheet time: 5mins
The first World Environment Day was held in which year?
A. 1971
B. 1974
C. 1976
D. 1978
Environment includes
A. biotic components
C. oxygen & nitrogen
abiotic components
D. abiotic & biotic components
The largest ecosystem of earth is
A. biome
B. hydrosphere
C. lithosphere
D. biosphere
Global warming is expected to result in
A. increase in sea level
B. change in crop pattern
C. change in costal line
D. all of these
What is the cause of “Greenhouse effect”?
A. Nitrogen
B. Carbon dioxide
C. Carbon monoxide
D. Nitrogen dioxide
What is the biggest source of pollution in the world?
A. sewage & garbage
B. automobile laxity
C. herbicide & pesticide
D. industrial waste
The concentration of which gas is highest in our environment?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon dioxide
Layer of atmosphere in which Ozone layer lies is
A. exosphere
B. mesosphere
C. troposphere
D. stratosphere
The main source of water pollution is
A. Sewage Water
B. Rain Water
C. Atmospheric Pollutants
D. Well-Water
Which day is Earth Day?
A. April 22
B. December 21
C. August 12
D. October 31
