🌿 Science & Nature Trivia
Quiz Set 15 — Energy
Answer all 10 questions. Click an option to see if you got it right!
Question 1 of 10
What is the primary source of energy for Earth?
The Sun provides the vast majority of energy that drives Earth's climate, weather, and supports life.
Question 2 of 10
What type of energy is stored in food?
Food stores chemical energy in molecular bonds, which the body breaks down during metabolism.
Question 3 of 10
What is the most widely used renewable energy source globally?
Hydroelectric power is the most widely used renewable energy source, generating about 16% of global electricity.
Question 4 of 10
What is nuclear fission?
Nuclear fission is the process of splitting heavy atomic nuclei into lighter ones, releasing enormous energy.
Question 5 of 10
What device converts sunlight directly into electricity?
Photovoltaic (solar) cells convert sunlight directly into electricity using the photovoltaic effect.
Question 6 of 10
What is the unit of electrical energy?
The kilowatt-hour (kWh) measures electrical energy consumed, equal to 1,000 watts used for one hour.
Question 7 of 10
What fossil fuel produces the most CO2 per unit of energy?
Coal produces about twice the CO2 per unit of energy compared to natural gas.
Question 8 of 10
What is geothermal energy?
Geothermal energy harnesses heat from Earth's interior, generated by radioactive decay and residual formation heat.
Question 9 of 10
What country produces the most wind energy?
China leads the world in installed wind power capacity, generating over 400 GW.
Question 10 of 10
What type of energy does a moving car have?
A moving car has kinetic energy — the energy of motion, proportional to mass and the square of velocity.