Air around us Worksheet-4
Multiple-Choice Question:
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What are the possible sources of groundwater contamination?
(a) Septic tanks (b) Landfills
(c) Animal wastes (d) All of these
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Wearing down of soil on land by the action of water, wind, or ice called?
(a) Melt down (b) Erasing (c) Erosion (d) Conservation
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What is the change in the quality of water called that makes it unsuitable for certain uses?
(a) Pollution (b) Evaporation
(c) Condensation (d) Disinfection
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What is the constant circulation of water from the atmosphere to the land and the oceans, and back again called?
(a) Weather cycle (b) Twister cycle
(c) Hydrological cycle
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What is water saturated land where aquatic plants and animals live called?
(a) Aquifer (b) Wetland
(c) River (d) Lake
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What is the movement of water down through the Earth’s surface called?
(a) Infiltration (b) Irrigation
(c) Irradiation (d) Instillation
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Which of the following element is added to water to prevent tooth decay?
(a) Chlorine (b) Iodine (c) Sugar (d) Fluoride
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The above given pie chart describes about the percentage of air composed of several gases. Which one of the following holds true for the given pie chart?
(a) 79% nitrogen, 19% oxygen, 2% other gases
(b) 78% nitrogen, 20% oxygen, 2% other gases
(c) 78% nitrogen, 21% oxygen, 1% other gases
(d) 75% nitrogen, 24% oxygen, 1% other gases
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What is the lack of precipitation for a long period of time called?
(a) Heat wave (b) Drought
(c) Flood (d) Cyclone
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Animals such as cockroach have small openings called _________ through which they respire.
(a) spiracles (b) lungs (c) lenticels (d) pores
Answer Key:
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(d)
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(c)
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(a)
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(c)
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(b)
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(a)
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(d)
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(c)
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(b)
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(a)