Available Answers

1. 1.

   Answer the questions given by choosing the correct option.

   1. The troposphere has the largest concentration of ______________.
      1. oxygen
      2. nitrogen 
      3. water vapour
      4. atoms
   2. When snow and rain fall together, it is called ______________.
      1. mist
      2. sleet
      3. drizzle
      4. dew
   3. Lines that join places that have the same ______________ are called isogyets.
      1. rainfall
      2. wind
      3. temperature 
      4. sunshine
   4. ______________ process is known as onion peeling.
      1. Granular disintegration 
      2. Frost shattering 
      3. Block disintegration 
      4. Exfoliation 
   5. Rain, hail, sleet and snow are all forms of ______________.
      1. weather 
      2. precipitation 
      3. clouds
      4. maps
2. 2.

   Fill in the blanks.

   1. In a topographical sheet ____________ colour represent cultivated area.
   2. ____________ refers to the amount of moisture or water vapour present in the air.
   3. ____________ rocks are referred to as primary rocks.
   4. Metamorphic rocks are mainly divided into two types on the basis of their ____________.
   5. Air pressure is recorded with the help of a ____________.
3. 3.

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

   1. Troposphere has high night-shining (noctilucent) clouds.
   2. Extrusive rocks are smooth and fine-grained.
   3. Degradation is the process of lowering down of the Earth's elevated landforms.
   4. Ahmedabad is an important centre for cotton textile.
   5. Air pressure is the highest at the sea level.
4. 4.

   Differentiate between Aggradation and Degradation.

5. 5.

   Differentiate between Large-scale industry and Small-scale industry.

6. 6.

   What is global warming? What are its effects?