EARTH MCQS SET 10

EARTH MCQS SET 10

1. "Mohs' Scale" is used to indicate the:
(a) degree of brittleness of a substance
(b) degree of hardness of minerals.
(c) degree of viscosity of a liquid
(d) degree of elasticity of a material
Ans: (b)
 
2. Match the following:
A. Lithosphere 1. The relatively light rocks that form the continental crust
B. Asthenosphere 2. The relatively dense rocks that form the oceanic crust
C. Sima 3. Part of earth's upper mantle
D. Sial 4. The outer portion of the earth including the crust
A B C D
(a) 2 3 4 1
(b) 3 4 1 2
(c) 4 3 2 1
(d) 3 2 1 4
Ans: (c)
 
3. At neap tide:
1. the sun and moon exert their force at right angles
2. the tidal amplitude is high
3. the low tides are very low
(a) 1
(b) 2 and 3
(c) 1 and 2
(d) 1, 2 and 3
Ans: (a)
 
4. If a solar eclipse occurs when the moon is quite far from the earth, the eclipse would be
likely to be :
(a) total
(b) partial
(c) annular
(d) none of these
Ans: (c)
 
5. What can be the maximum duration of totality for a solar eclipse?
(a) 12.5 minutes
(b) 7 minutes 40 seconds
(c) 1 hour 40 seconds
(d) There is no maximum duration
Ans: (b)
 
6. Which of the following are true regarding the crust of the earth?
1. It is the outer thin layer with a total thickness of about 100 km
2. It forms around 0.5 percent of the earth's volume
3. The outer covering of the crust is of sedimentary material
 
4. The lower layer of the crust consists of basaltic and ultra-basic rocks
(a) I and II
(b) I, II and III
(c) I, II and IV
(d) I, II, III and IV
Ans: (c)
 
7. The total surface area of earth is :
(a) 510 million sq km
(b) 610 million sq km
(c) 710 million sq km
(d) 810 million sq km
Ans: (a)
 
8. What is the approximate equatorial circumference of the earth?
(a) 30,000 Km
(b) 35,000 Km
(c) 40,000 Km
(d) 45,000 Km
Ans: (c)
 
9. The approximate diameter of the earth is :
(a) 4,200 Km
(b) 6,400 Km
(c) 12,800 Km
(d) 15,600 Km
Ans: (c)
 
10. The place which has the longest day and the shortest night on 22nd December, is :
(a) Chennai
(b) Madrid
(c) Melbourne
(d) Moscow
Ans: (c)