Air around us Worksheet-4

Air around us Worksheet-4


Multiple-Choice Question:

  1. What are the possible sources of groundwater contamination?

(a) Septic tanks                                (b) Landfills

(c) Animal wastes                            (d) All of these


  1. Wearing down of soil on land by the action of water, wind, or ice called?

(a) Melt down     (b) Erasing           (c) Erosion           (d) Conservation


  1. 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


  1. 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


  1. What is water saturated land where aquatic plants and animals live called?

(a) Aquifer                                        (b) Wetland

(c) River                                            (d) Lake


  1. What is the movement of water down through the Earth’s surface called?

(a) Infiltration                                  (b) Irrigation

(c) Irradiation                                   (d) Instillation


  1. Which of the following element is added to water to prevent tooth decay?

(a) Chlorine         (b) Iodine             (c) Sugar              (d) Fluoride


  1. 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


  1. What is the lack of precipitation for a long period of time called?

(a) Heat wave                                  (b) Drought

(c) Flood                                           (d) Cyclone


  1. Animals such as cockroach have small openings called _________ through which they respire.

(a) spiracles         (b) lungs              (c) lenticels          (d) pores


Answer Key:

  1. (d)
  2. (c)
  3. (a)
  4. (c)
  5. (b)
  6. (a)
  7. (d)
  8. (c)
  9. (b)
  10. (a)