Available Answers

1. 1.

   Choose the correct option.

   1. _______________ is not a type of weathering.
      1. Chemical
      2. Biological
      3. Mechanical
      4. Historical
   2. _______________ process is very similar to the rusting of iron.
      1. Oxidation
      2. Hydration
      3. Exfoliation
      4. Carbonation
   3. _________________ process is known as onion peeling.
      1. Granular disintegration
      2. Frost shattering
      3. Block disintegration
      4. Exfoliation
   4. ______________ is not responsible for soil formation.
      1. Subsoil
      2. Parent rock material
      3. Human activities
      4. Climate
   5. Soil erosion can be controlled by ________________.
      1. overgrazing
      2. afforestation
      3. weathering
      4. deforestation
2. 2.

   Fill in the blanks.

   1. Rock is solid material composed of grain of ________________.
   2. The word 'igneous' has been taken from the Latin word ignis which means' ______________.
   3. Metamorphic rocks are mainly divided into two types on the basis of their _______________.
   4. The Latin word 'sedimentus' means' ____________'.
   5. ________________ is the layer made up of finer rocks, silt and clay, which lies below the top soil.
3. 3.

   Write (T) for true and (F) for false.

   1. Carbon dioxide from the atmosphere dissolves in rainwater and forms carbonic acid.
   2. Weathering follows the process of erosion.
   3. Degradation is the process of lowering down of the Earth's elevated landforms.
   4. Coal is am example of organic sedimentary rocks.
   5. Most igneous rocks are composed of basalt or marble.
4. 4.

   Differentiate between Aggradation and Degradation.

5. 5.

   Differentiate between Oxidation and Hydration.

6. 6.

   Differentiate between Gully erosion and Sheet erosion.