Question

The energy which is not derived from the sun is:
A. biomass
B. fossil fuels
C. nuclear energy
D. geothermal energy

Answer 1

Hint:To solve this problem learn about each type of energy source biomass, fossil fuels, nuclear energy, and geothermal energy -that is given in the option given, and relate them if they are derivable from sun’s energy directly or indirectly.

Complete answer:
Fossil fuels are the type of fuels which we get from the earth's surface and formed by the decomposition of living organisms- plants, animals, etc. over a certain period of millions of years. Fossil fuels are derived from the sun's energy directly or indirectly.

Biomass is a type of energy source which we get by the decomposition of various waste bodies or residuals by utilizing their energy .The source of biomass energy can be seeds, corn, cow dunk etc. This energy is also derived from the sun's energy indirectly.

Nuclear energy is a type of energy which is seen due to the property of radioactivity in certain elements. Nuclear energy is the type of energy when unstable nuclei breaks into smaller nuclei as a byproduct we get we get energy. This is called nuclear fission. When two light atoms joined together they release an enormous amount of energy this is called nuclear fission. So, this form of energy is derivable from the sun's energy directly or indirectly.

Geothermal energy is a type of thermal energy of the earth core. We know that this type of thermal energy is not related to the sun's energy since this energy is directly harnessed from the earth’s crust. From the above discussions, we can easily say that geothermal energy and nuclear energy cannot be derived from the sun's energy whereas fossil fuels and biomass energy are directly or indirectly derived from the energy of the sun.

Therefore, the options C and D are correct.

Note:Do not confuse with geothermal energy as the heat energy derived from the sun because geothermal energy is a type of energy which is due to the hot core of the earth. The sun is powered by nuclear energy since the sun has a huge source of hydrogen and due to nuclear fission and fusion the sun gets the heat energy.