Question

1. Name two renewable sources of energy.
2. State three conditions necessary for the formation of petroleum.

Answer 1

1.  
   1. Wind
   2. Wood
   3. Biogas
   4. Water
   5. Geothermal steam
   6. Sun
   7. Draught animals
2.  
   1. Compression of the remains of flora and fauna due to folding of the layers of rocks
   2. Deposition of other layers of rocks/non-porous/over the remains of flora and fauna.
   3. Presence of porous rocks
   4. Presence of flora and Fauna over a long period of time.