Tag: lithosphere and asthenosphere

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Questions Related to lithosphere and asthenosphere

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

A waterfall arises when the hard rock layer is ___________.

  1. Vertical

  2. Horizontal

  3. Dips gently upstream

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Waterfalls occur when a river flows over a layer of hard rock that resists erosion, while the softer rock underneath erodes more quickly. This can happen whether the rock is vertical, horizontal, or dipping.

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

Rocks are classified into ________________.

  1. Volcanic, sedimentary and organic

  2. Volcanic, igneous and sedimentary

  3. Metamorphic; sedimentary and aqueous

  4. Igneous, metamorphic, sedimentary and organic
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice geography rocks and rock types lithosphere and asthenosphere rocks and rock cycle introduction to rocks, volcanoes and earthquakes

Contact metamorphism generally occurs near_____.

  1. igneous intrusions

  2. sediment extrusions

  3. igneous extrusions

  4. sediment intrusions
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Contact metamorphism is a type of metamorphism where the texture of rock minerals are changed by means of heat, due to contact with magma, which is generally an igneous intrusion, i.e; the formed magma is trapped beneath the Earth's surface.

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

Which one of the following statements is NOT correct?

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

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

  3. Granite has large crystals of quartz, feldspar and mica in it

  4. A metamorphic rock is softer and less compact than its original type
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Metamorphic rocks are formed by the transformation of existing rocks under intense heat and pressure. This process typically makes them more compact and harder than their original parent rocks, not softer.

Multiple choice geography plate tectonics lithosphere and asthenosphere rocks and rock cycle rocks and rock types

Igneous rocks that have the lowest content of silica are known as______

  1. felsic rocks

  2. porphyry

  3. mafic rocks

  4. ultramafic rocks
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultramafic rocks are the igneous rocks that have the lowest content of silica.


Felsic rocks- rich in feldspar and silicon (igneous rock).

Porphyry- igneous rock having feldspar & quartz crystals.
Mafic rocks- igneous rocks rich in magnesium and iron.

Thus the answer is Ultramafic rocks.

Multiple choice geography plate tectonics lithosphere and asthenosphere rocks and rock cycle rocks and rock types

The volcanoes which are not active now but have the possibility of eruption in the future are known as ______________.

  1. Composite volcanoes

  2. Dormant volcanoes

  3. Extinct volcanoes

  4. Extrusive volcanoes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dormant volcanoes are those that are not currently erupting but have erupted in the past and are expected to erupt again in the future.