From what does the Sun derive its energy?

From what does the Sun derive its energy?

• A. Nuclear reactions in its core which fuse hydrogen atoms together to create helium
• B. Chemical reactions on the surface
• C. Gravitational contraction
• D. Electrical energy captured by solar panels

Answer: (A)

Hydrogen fusion in the core powers the Sun. At the core’s extreme temperature and pressure, hydrogen nuclei fuse to helium, releasing energy because some mass is converted to energy in the process. This energy starts as high-energy photons and slowly diffuses outward, becoming the sunlight we see. Chemical reactions on the surface would release far less energy and can’t sustain the Sun’s brightness. Gravitational contraction could have provided energy in the distant past, but it wouldn’t keep the Sun shining for billions of years. Electrical energy from solar panels isn’t how the Sun produces energy; panels convert sunlight into electricity, they don’t generate the Sun’s energy itself.

Hydrogen fusion in the core powers the Sun. At the core’s extreme temperature and pressure, hydrogen nuclei fuse to helium, releasing energy because some mass is converted to energy in the process. This energy starts as high-energy photons and slowly diffuses outward, becoming the sunlight we see. Chemical reactions on the surface would release far less energy and can’t sustain the Sun’s brightness. Gravitational contraction could have provided energy in the distant past, but it wouldn’t keep the Sun shining for billions of years. Electrical energy from solar panels isn’t how the Sun produces energy; panels convert sunlight into electricity, they don’t generate the Sun’s energy itself.