Tag: rocks and rock cycle

Questions Related to rocks and rock cycle

Rocks which are formed by the solidification of lava, are________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. Sandstone

  2. Limestone

  3. Granites

  4. Basalts

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Correct Option: D

Rocks are the economic significance because _________________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. They provide soils.

  2. They provide metals.

  3. They provide minerals.

  4. All of these

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Correct Option: D
Explanation:
  • Rocks are the parent material for soil.
  • Rocks are also found in form of ores which serve as a source of various metals.
  • Rocks are the source of various minerals like phosphates and nitrates.
  • Hence all are correct.

Fossil fuels are obtain from _____________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. mineral ores

  2. rocks

  3. water

  4. none of these

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Correct Option: B
Explanation:
  • Fossil fuels are obtained from sedimentary rocks and are formed under extreme temperature and pressure conditions.
  • When the fossil sediments get compressed into the rocks, with passing time there is the gradual decay of the fossils under extreme temperature and pressure which converts fossils into fossil fuels deep inside.

The earth is said to be _________ million years old.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. 4700

  2. 5000

  3. 5015

  4. 5014

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Correct Option: A
Explanation:
  • By dating the rocks in Earth's crust, as well as the rocks in Earth's neighbours, such as the moon and visiting meteorites, scientists have calculated that Earth is 4500 million years old.
  • Option A is closest, thus it is correct answer.

Rock cycle is a continuous chain through which  ___________________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. old rock transforms into new rock

  2. new rock transforms into old rock

  3. weathering of rock happens

  4. none of these

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Correct Option: A
Explanation:

Rocks do not remain in their original form for long but may undergo transformation. Rock cycle is a continuous process through which old rocks are transformed into new ones.

The igneous rocks are formed due to ____________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. plate tectonic

  2. volcanic acitivity

  3. weathering

  4. none of these

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Correct Option: B
Explanation:

Igneous rocks are of two types, extrusive and intrusive. Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, solidifies at a faster rate.

The rock cycle is the process pass through formation of _______________.

geography rocks and rock cycle rock cycle and uses of rocks rocks - introduction and importance lithosphere and asthenosphere

  1. Sedimentary rock

  2. Metamorphic

  3. Igneous

  4. All of the above

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Correct Option: D
Explanation:
  • Rock cycle is the transition of rocks of 3 basic types viz igneous, sedimentary and metamorphic into each other in a cyclic manner.
  • Primary rock is an igneous rock which is formed after solidification of lava. It may then get eroded and settled as various layers to form sedimentary rocks. The sedimentary rocks get metamorphosised under high pressure and temperature beneath the earth crust which forms metamorphic rocks.
  • Finally, all types of rocks may get subducted deep inside the earth were under extreme temperatures they get melted leading to the formation of liquid magma and the cycle repeats.
  • Thus all options are part of this cycle and option D is correct.

The largest dry rock in India is situated in _____________.

geography rocks and rock types lithosphere and asthenosphere rocks and rock cycle introduction to rocks, volcanoes and earthquakes

  1. Mumbai

  2. Cochin

  3. Marmugao

  4. Nasir

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Correct Option: C

A waterfall arises when the hard rock layer is ___________.

geography rocks and rock types lithosphere and asthenosphere rocks and rock cycle introduction to rocks, volcanoes and earthquakes

  1. Vertical

  2. Horizontal

  3. Dips gently upstream

  4. All of these

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Correct Option: D

Rocks are classified into ________________.

geography rocks and rock types lithosphere and asthenosphere rocks and rock cycle introduction to rocks, volcanoes and earthquakes

  1. Volcanic, sedimentary and organic

  2. Volcanic, igneous and sedimentary

  3. Metamorphic; sedimentary and aqueous

  4. Igneous, metamorphic, sedimentary and organic

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Correct Option: D
Explanation:
  • Rocks are basically classified as igneous, metamorphic and sedimentary rocks.
  • Organic rocks are a type of sedimentary rock which contain high amounts of organic carbon.
  • Hence option D is correct.