Water and its importance Worksheet-6

Water and its importance Worksheet-6

Multiple -Choice Question:

51. Which metal, used in leather tanning, causes ground and surface water pollution on entering nearby water bodies?

(a) Chromium     (b) Aluminium    (c) Iron                 (d) Lead

52. What is the study and collection of shells known as?

(a) Ornithology                                (b) Paleontology

(c) Conchology                                (d) Archaeology

53. The water cycle is the Earth's way of _______.

(a) Cleaning the water                    (b) Recycling water

(c) Using up all of the water           (d) Getting rid of water

54. The water cycle begins with ________.

(a) Evaporation

(b) Condensation

(c) Precipitation

(d) Water cycle has no beginning or end

55. As time goes by, and water goes through the water cycle again and again, the amount of water on Earth _______.

(a) Goes up and down                    (b) Stays the same

(c) Decreases                                   (d) Increases

56. The top of an underground area where the soil and rock particles are saturated with water is called the ________.

(a) runoff                                          (b) algal bloom

(c) water table                                 (d) leachate

57. By how much percentage garden mulching reduces evaporation?

(a) 90 per cent                                 (b) 50 per cent

(c) 75 per cent                                 (d) 65 per cent

58. How many litres of fresh water can get polluted by one drop of oil?

(a) 100 litres       (b) 10 litres         (c) 1 litre              (d) 1000 litres

59. Which watering method is NOT the best way to conserve water? 

(a) Drip system                                (b) Soaker hose

(c) Overhead sprinklers                  (d) Manually

60. Which plants might be more resistant to drought?

(a) Those with densely hairy leaves

(b) Those with waxy coated leaves

(c) Those with prickly leaves

(d) All of these

Answer Key:

51. (a)
52. (c)
53. (b)
54. (d)
55. (b)
56. (c)
57. (c)
58. (a)
59. (c)
60. (d)