World Geography – Section 3

16. The relative abundance of dissolved salts in seawater in descending order is as follows

A. Chlorine, sodium, sulfate, magnesium, calcium, potassium
B. Sodium, chlorine, magnesium, potassium, sulfate, calcium
C. Chlorine, magnesium, calcium, sodium, potassium, sulfate
D. Chlorine, sodium, magnesium, calcium, potassium, sulfate

Correct Answer: A. Chlorine, sodium, sulfate, magnesium, calcium, potassium

17. The planets with no natural satellites (reported so far) are

A. Mercury and Venus
B. Earth and Pluto
C. Mars and Neptune
D. Jupiter and Saturn

Correct Answer: A. Mercury and Venus

18. The percentage of the incident radiation reflected back to space is called

A. Planet’s albedo
B. Earth’s albedo
C. Both are similar terms
D. None of the above

Correct Answer: A. Planet’s albedo

19. The plants of which of the following crops are highly sensitive to frost?

A. Barely
B. Cotton
C. Maize
D. None of the above

Correct Answer: B. Cotton

20. The religion of Afghanistan is

A. Islam
B. Buddhism
C. Hinduism
D. Christianity

Correct Answer: A. Islam

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