Which of the following is renewable sources
a) cross
b) oil
c) coal
d) copper
The main cause of source depletion is…………
a) animals
b) birds
c) men
d) plants
Cause of source depletion is………………….
a) over consumption
b) over population
c) irrigation
d) forestry
e) all of these
Tidal power is also called……………………..
a) solar energy
b) lunar energy
c) light energy
d) none of these
Non conventional energy source?
a) tidal power
b) wind power
c) wave power
d) solar energy
e) all of these
The outer crust of earth has an average thickness of 32km and below that is…………..
a) crust
b) magma
c) layer
d) none of these
