The most common natural gas is …………
a) ethyne
b) methane
c) ethene
d) methyne
Fossil fuels are consumed in more than…….of the world demand.
a) 70%
b) 80%
c) 90%
d) 100%
Bio energy is energy from ………..
a) animals
b) plants
c) humans
d) all of these
The term…….refers to the material from which we get bio energy.
a) solar mass
b) planet mass
c) global mass
d) bio mass
Bio mass is produced by the process of ………
a) respiration
b) photosynthesis
c) both a & b
d) none of these
Explanation: biomass is produced when the sun’s solar energy is converted into plant matter (carbohydrates) by the process of photosynthesis.
Geothermal energy is the energy recovered from Earth’s…….
a) atmosphere
b) layers
c) surface
d) core
