Available Answers

1. 1.

   What is lithosphere? How is it useful for us?

2. 2.

   Write the importance of hydrosphere.

3. 3.

   What is atmosphere? Name its different layers.

4. 4.

   What constitutes biosphere?

5. 5.

   Why is the Sun important for the Earth?

6. 6.

   Fill in the blanks.

   1. The energy obtained from the Sun is called the ___________ energy.
   2. The Earth is surrounded by a layer of air called the ____________.
   3. The ___________ gas protects the Earth from the harmful ultraviolet rays of the Sun.
   4. The sphere of life is also called _____________.