Tag: rocks and rock types

Questions Related to rocks and rock types

Molten rock below the surface of the earth is called_____________.

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

  1. Basalt

  2. Laccolith

  3. Lava

  4. Magma

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Correct Option: D

Rocks formed by the cooling of the hot masses of the earth or solidification of molten matter are called _______________.

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

  1. Hard rocks

  2. Igneous rocks

  3. Volcanic rocks

  4. Aqueous rocks

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Correct Option: B
Explanation:
  • Igneous rocks are the rocks that are formed by the cooling of hot masses or by the solidification of molten matter, hence option B is correct.
  • Hard rock is any rock that is hard. It is a very general term.
  • Aqueous rocks are the rocks deposited by the water and they get formed in layers or strata.
  • Volcanic rocks are the rocks coming out of the volcanic eruption which are mostly of igneous origin but as already the specific option of Igneous rocks is provided, option D is not the most suitable answer.

Rocks formed by the loose and broken fragments of the pre-existing rocks are called __________________.

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

  1. Sedimentary rocks

  2. Organic rocks

  3. Soft rocks

  4. Volcanic rocks

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Correct Option: A
Explanation:
  • When any rock gets broken it eventually gets eroded and transported to a different place where it settles down in layers. When many layers of such broken materials are piled up and take the form of a rock then it is called a sedimentary rock, hence option A is correct.
  • Soft rock is a general term for any soft rock.
  • Organic rock is a sedimentary rock which has high organic carbon.

Which of the following is not a metamorphic rock?

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

  1. Marble

  2. Granite

  3. Slate

  4. Quartze

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Correct Option: B
Explanation:
  • Marble, Slate and quartz are formed after metamorphism ie change in their original form due to extreme temperatures and pressure.
  • Granite is an igneous rock, thus option B is correct.

If a rock were formed from molten magma, what type of rock is it?

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

  1. Igneous

  2. Sedimentary

  3. Metamorphic

  4. none of the above

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Correct Option: A
Explanation:

Igneous rocks are formed during the formation of the upper crust of the earth on cooling, solidification, and crystallization of hot and liquid magmas after the origin of the earth. Igneous rocks are mostly associated with the volcanic activities and igneous rocks are generally found in the volcanic zones.

Identify the following igneous rock. It has fine grain size and is extrusive.

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

  1. Granite

  2. Pumice

  3. Both a and b

  4. None of the above

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Correct Option: D
Explanation:

None of the above


Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass. These rocks include andesite, basalt, obsidian, pumice, rhyolite, scoria, and tuff.

Andesite is a fine-grained, extrusive igneous rock composed mainly of plagioclase with other minerals such as hornblende, pyroxene, and biotite.

Rocks like sandstone which allow water to seep through readily are called ______________.

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

  1. Permeable rocks

  2. Sedimentary rocks

  3. Metamorphic rocks

  4. Mushroom rocks

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Correct Option: A
Explanation:
  • Permeable rocks are the rocks having interconnected pores which allow the water to seep through them. Hence option A is correct.
  • Sedimentary rocks and metamorphic rocks are a  broad classification of rocks.
  • Mushroom rocks derive their name out of their shape.

When the lava inside the Earth solidifies, it results in the formation of _______________.

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

  1. sedimentary rocks

  2. plutonic rocks

  3. volcanic rocks

  4. metamorphic rocks

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Correct Option: B
Explanation:
  • When the lava solidifies before reaching the surface, it gives rise to the rocks called plutonic rocks.
  • Volcanic rocks are formed when lava solidifies on the surface of the earth.
  • Sedimentary and metamorphic rocks are not directly related to lava.
  • Hence option B is the correct answer.

Stalactities and stalagmites are most common in ___________.

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

  1. limestone areas

  2. hard rock areas

  3. snow capped areas

  4. desert areas

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Correct Option: A
Explanation:

Stalactites and stalagmites are the depositional landforms of limestone areas. The calcareous deposits from dripping of water in dry caves are called dripstones. The columns of dripstones hanging from the cave ceiling are called stalactites while the calcareous columns of dripstones growing upward from the cave floor are known as stalagmites.

Which of the following statement is not correct :

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

  1. Black cotton soil of north-west India was formed by the weathering of basaltic lava rocks

  2. Sedimentary rock are distinguished from other types of rocks by the presence of distinct layers

  3. Granite has large cyrstals quartz feldspar and mica in it

  4. A metamorphic rock is softer and less compact than its original type

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Correct Option: B