Question

What is the main source of energy for Earth?
A. Moon
B. Plants
C. Humans
D. Sun

Answer 1

Hint: First let us see how earth gets energy-
Much of the earth’s energy is derived from quite a few sources: solar radiation, gravity, radioactive decay, and the earth’s rotation. Many surface cycles, such as winds, tides, the hydrological cycle and the overall climate system power solar energy.

Complete step by step solution:
Moon itself gets energy from the sun to rotate and revolve around the earth. So, option A cannot be correct.
The plants present on earth make food with the help of the sun. So, option B also cannot be correct. And plants are not the main source of energy for earth.
The humans derive energy from sunlight, water and food. So, option C also cannot be correct.

Sun is the last source of energy, since sun is essentially produced from both renewable and non-renewable sources. We receive solar energy that can be used for several purposes: Solar electricity, solar water heating, solar heating, solar ventilation, solar lighting, portable solar, solar transportation.

Hence, the required answer is sun, option D.

Additional information:
Energy comes from many places and is everywhere surrounding us. The sun is one of the most significant sources of light. The sun’s energy is the original cause of much of the energy that is found on earth. We gain solar heating from the sun, and it is possible to use sunlight to generate energy from solar cells.

Note: As both sustainable and non-renewable sources are essentially derived from the sun, the sun is the ultimate source of energy. We are having renewable energy that can be used for multiple applications.