661. Along the coasts salinity is
A. lowered
B. increased
C. stable
D. unaffected
✅ The correct answer is option A.
UPSC
662. Which one of the following types of plains is not formed by the action of the riven?
A. Loess plains
B. Alluvial plains
C. Flood plain deposits
D. Deltas
✅ The correct answer is option A.
663. The coral reefs are most characteristic of
A. Indian Ocean
B. Pacific Ocean
C. Atlantic Ocean
D. Mediterranean Sea
✅ The correct answer is option B.
664. What is the usual altitude of the plains?
A. Sea level
B. Less than 500 metres above sea level
C. Less than 600 metres above sea level
D. Less than 800 metres above sea level
✅ The correct answer is option B.
665. The fog that commonly occurs along the sea-coasts is of the ______ type.
A. radiation
B. advection
C. frontal
D. convection
✅ The correct answer is option B.
666. Malaspine Glacier is in
A. Karakoram Range
B. Alps
C. Alaska
D. Hindukush
✅ The correct answer is option C.
667. Hurricanes or typhoons (tropical cyclones) develop and mature
A. over land bodies only
B. in a belt 35°-65° N and S latitudes
C. anywhere in the tropical zone
D. over water bodies only
✅ The correct answer is option D.
668. The radiation that heats earth’s atmosphere comes from the
A. sun
B. earth
C. ionosphere
D. sun and earth
✅ The correct answer is option B.
669. Excess carbon dioxide in the atmosphere due to pollution will cause
A. earth’s temperature to rise
B. earth’s temperature to fall
C. no change in earth’s temperature
D. increase in ultra-violet radiation reaching the earth
✅ The correct answer is option A.
670. Which of the following absorbs the insolation from the sun and preserves the earth’s radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?
A. Dust
B. Water vapour
C. Ozone
D. Nitrogen
✅ The correct answer is option C.