universe & solar system section 4 Practice Questions Answers Test with Solutions & More Shortcuts

Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]

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Question : 26 [NDA 2008-II]

Which one of the following has geographical position of 0° latitude and 0° longitude?

a) In Ghana, a West African country

b) At Greenwich Observatory in England

c) In the Mediterranean Sea

d) In the South Atlantic Ocean

Discuss »

Answer: (b)

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich(London).

The Royal Observatory is also the source of the Prime Meridian of the world, Longitude 0° 0’ 0’’.

Every place on the Earth is measured in terms of its distance east or west from this line. The Prime Meridian runs through Greenwich (England) and is at 0° longitude.

Question : 27 [PCS (Pre) 2016]

Which one of the following is not a natural unit of time?

a) Standard time

b) Day

c) Lunar month

d) Tropical year

Discuss »

Answer: (a)

Question : 28

Carbon is the ........... most abundant element in the earth’s crust.

a) 15th

b) 16th

c) 14th

d) 13th

Discuss »

Answer: (a)

Carbon is the 15th most abundant element in the earth’s crust.

Question : 29

The earth is in aphelion on

a) Sept. 23

b) July 4

c) Dec. 22

d) June 21

Discuss »

Answer: (b)

Question : 30

Consider the following two statements, one labelled as the Assertion (A) and other as Reason (R). Examine these two statements carefully and select the correct answer by using the codes given below:
Assertion (A):
Venus is the brightest object in the sky after sunset.
Reason (R):
Venus is the second planet from the Sun in our solar system.
Codes:

a) A is true, but R is false.

b) A is false, but R is true.

c) Both A and R are true, but R is not the correct explanation of A.

d) Both A and R are true and R is the correct explanation of A.

Discuss »

Answer: (c)

Venus is the brightest object in the sky after Sunset.

Venus is the second planet from the sun in our solar system.

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