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Geomorphology - Geography Objective Questions with Answers | Page-21

Questions
101 The top of the cone of a volcanic mountain has a depression known as the
A Sill
B Water
C Lopolith
D Crater

Answer: Option [D]

The top of the cone of a volcanic mountain has a depression known as the Crater. A volcanic cone is a triangle-shaped hill formed as material from volcanic eruptions piles up around the volcanic vent, or opening in Earth's crust. Most volcanic cones have one volcanic crater, or central depression, at the top. They are probably the most familiar type of volcanic mountain.

102 The Earth turns through 3600 in 24 hrs. Each 150 longitude represents
A 15 minutes
B Half an hour
C One hour
D 1 hour 15 minutes

Answer: Option [C]

The correct answer is One hour. It takes 24 hours for the sun to go through the full 360° around the world, so an hour of time is equal to 15° of longitude.

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103 Which instrument is used to keep the correct Greenwich Mean Time ?
A Clinometer
B Barometer
C Chronometer
D None of the above

Answer: Option [C]

The correct answer is Chronometer. A highly accurate timepiece which is used to keep Greenwich meantime – chronometer is best defined in this option because chronometer is a time that is based on the relationship between zone time and Greenwich mean time. Thus, this option is the most appropriate answer.

104 Grooving are formed due to
A Erosion by glacier
B Deposition by river
C Erosion by underground water
D None of the above

Answer: Option [A]

Grooving are formed due to Erosion by glacier. As glaciers spread out over the surface of the land, (grow), they can change the shape of the land. They scrape away at the surface of the land, erode rock and sediment, carry it from one place to another, and leave it somewhere else. Thus, glaciers cause both erosional and depositional landforms.

105 Lapies are formed by
A Erosion by wind
B Erosion by glacier
C Erosion by river
D Erosion in limestone areas

Answer: Option [D]

Lapies are formed by erosion in limestone areas. When water flows over a surface having limestone along with other hard rocks, lapies are formed. Limestone being a soft rock, erodes the limestone forming several narrow and deep trenches like structures, clints, and grikes dispersed by sharp pin-like vertical pinnacles roughly parallel to each other.

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