1731. is the thinnest layer of Earth.
A. Mantle
B. Outer Core
C. Crust
D. Inner Core
✅ The correct answer is option C.
UPSC
1732. Why is the South Pole colder than the North Pole?
A. High altitude
B. More rainfall
C. Strong winds
D. Away from the sun
✅ The correct answer is option A.
1733. Tides are caused by the gravitational pull of the –
A. Earth on the Moon
B. Earth on the Sun
C. Sun and Moon on the Earth
D. Moon on the Earth
✅ The correct answer is option C.
1734. The main cause of Tsunami is :
A. Volcanoes
B. Cyclones
C. Earthquake on sea floor
D. Moon’s attraction
✅ The correct answer is option C.
1735. Rubber plantations are found in –
A. Temperate forests
B. Mountain regions
C. Polar regions
D. Equatorial regions
✅ The correct answer is option D.
1736. The one who is engaged in scientific drawing of maps is called –
A. Geographer
B. Cartographer
C. Meteorologist
D. Geologist
✅ The correct answer is option B.
1737. Which of the following exhibits unidirectional flow in an ecosystem?
A. Light
B. Energy
C. Water
D. Biomass
✅ The correct answer is option B.
1738. Which is the most stable ecosystem?
A. Desert
B. Ocean
C. Mountain
D. Forest
✅ The correct answer is option B.
1739. The topography of plateau is ideal for –
A. cultivation
B. forestry
C. mining
D. generation of hydro power
✅ The correct answer is option D.
1740. An artificial ecosystem is represented by
A. pisciculture tank
B. agricultural land
C. zoo
D. aquarium
✅ The correct answer is option D.