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Which main process produces energy in a star?

Answer and explanation

Correct answer: Nuclear fusion

The governing scientific concept is nuclear energy generation in stars. In the hot, dense core of a star such as the Sun, hydrogen nuclei combine through a sequence of nuclear-fusion reactions to form helium. A small amount of mass is converted into a large amount of energy, according to the mass–energy relationship expressed by E = mc². This released energy travels outward and eventually reaches space as radiation, including the light and heat we observe. Therefore option A is correct. Evaporation is a change of state in matter, while erosion and weathering are surface processes that shape landforms; none can power a star. The distinction to remember is that fusion joins light atomic nuclei, whereas fission splits heavy nuclei.

Related tags

GeographyStarsNuclear FusionSolar SystemStar FormationFormation Of PlanetsAnd Our Solar SystemStar Formation Formation Of Planets And Our Solar SystemThe Origin And Evolution Of The EarthClass 11 Mcq

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