Our sun supplies energy to the Earth as a result of solar fusion. Hydrogen atoms undergo fusion to make helium.
Which of the following statements below most accurately describe fusion in the sun?
Four protons combine to make helium and this is an exothermic chemical reaction that produces a high amount of energy which streams to the Earth.
When the four protons create helium, the four particles combine in a single step as a result of the high pressure pushing them together. Two protons change into neutrons. This is a reaction that releases energy from the interaction of the quarks during that change.
The mass of the helium produced is less than the mass of the four protons that came together. The mass difference is converted to energy.
The interior of the sun is very hot. So hot in fact, that the hydrogen burns. This oxidation reaction creates the energy that comes from the sun.