Tag: plate tectonics

Questions Related to plate tectonics

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

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

  1. felsic rocks

  2. porphyry

  3. mafic rocks

  4. ultramafic rocks

Show answer
Correct Option: D
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.

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

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

  1. Composite volcanoes

  2. Dormant volcanoes

  3. Extinct volcanoes

  4. Extrusive volcanoes

Show answer
Correct Option: B