Geography Class 7th
41. Natural agents scratching the surfaces of earth:
A) Denudation
B) Weathering
C) Erosion
D) Removal
42. Erosion can take place due to ______ agents.
A) One
B) Two
C) Four
D) Six
43. Biltora Glacier is _______ miles long
A) 23
B) 25
C) 36
D) 42
44. ______%_ land has become due to erosion.
A) 10
B) 20
C) 40
D) 60
45. _______ is blanket of air surrounding the earth.
A) Biosphere
B) Atmosphere
C) Lithosphere
D) Geosphere
46. Ozone protects the earth From:
A) Infrared Light
B) Sunlight
C) UV light
D) None of the above
47. Skin cancer is caused by:
A) Infrared Light
B) Sunlight
C) UV light
D) None of the above
48. The lowest layer of atmosphere is :
A) Troposphere
B) Exosphere
C) Mesosphere
D) Stratosphere
49. The average height of Troposphere is:
A) 5 km
B) 10 km
C) 12km
D) 17km
50. The height of troposphere at the equator is:
A) 5 km
B) 10 km
C) 16km
D) 17km
51. The height of troposphere at the poles is :
A) 5 km
B) 10 km
C) 8km
D) 17km
52. The Second layer of atmosphere is:
A) Exosphere
B) Thermosphere
C) Stratosphere
D) Troposphere.
53. The height of Stratosphere is:
A) 13 km
B) 21 km
C) 48 km
D) 24 km
54. The main component of Stratosphere is:
A) Clouds
B) Ozone
C) Earth
D) None of the above
55. The height of Mesosphere is _______ km.
A) 34
B) 50
C) 45
D) 80
56. The Coldest layer of atmosphere ___________.
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Exosphere
57. The Exosphere starts from ________ and goes to ______.
A) 67 , 80
B) 80, 100
C) 80, Space
D) 100,150
58. The hotness or coldness of a body is called as:
A) Warmth
B) Coldness
C) Temperature
D) None of the above
59. ________ is used to measure the temperature.
A) Ruler
B) Thermometer
C) Protector
D) Oscilloscope
60. Which of the following scale is used to measure temperature:
A) oC
B) o F
C) Both A and B
D) None of the above