a. Renewable and son sewable source of energy.
|The energy sources which can be obtained continiously are called renewable sources.||The energy sources which can't be obtained continuously are called non-renewable sources.|
|It is formed in a short period of time.||It takes a long time to be formed.|
|They never get exhausted from nature.||They get exhausted from nature.|
b. Nuclear fission and nuclear fusion.
|Nuclear fission||Nuclear fusion|
|It is the process of splitting a single nucleus into many nuclei.||It is the process of combining many nuclei into a nucleus.|
|It can be controlled.||It cannot be controlled.|
|Atom bombs are made on this principle.||Nuclear bombs are made on this principle.|
|Comparatively, less energy is produced.||Comparatively, more energy is produced.|
c. Biomass and biogas.
|Biomass is the source of biogas.||Biogas is the product of biomass.|
|It is an energy source.||It is energy.|
|Cattle dung, sewage, etc. are biomass.||Electricity or heat are biogas results.|
d. Wind energy and tidal energy.
|Wind energy||Tidal energy|
|The energy generated using the currents of wind.||The energy generated using the currents of tides on the sea.|
|The wind rotates the turbine here.||The water rotates the turbine here.|
|It is used for pumping, sailing, etc.||It is used for electricity generation.|
e. Solar energy and fuel energy.
|Solar energy||Fuel energy|
|The energy produced by using the heat and light energy of the sun is solar energy.||The energy produced by using fuels formed from fossils is fuel energy.|
|It is the main source of energy.||It is an alternative source of energy.|
|It is formed on the sun.||It is formed under the earth's crust.|