Astronomy Ch 16: What Powers the Sun FINAL

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Last updated 10:14 PM on 5/10/26
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14 Terms

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fusion

2 small nuclei combine to make a larger atom

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fission

when a large atom splits into 2 smaller atoms

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all nuclear reactors on earth

fission reactors, typically contain uranium and plutonium

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annihilation

when a particle and antiparticle meet, both the particle and antiparticle are completely destroyed and completely turned into energy

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einstein’s famous equation, e=mc2

shows how mass can be turned into energy and vice versa

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antiparticle of electron

positron

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all stars are powered by

fusion

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hydrogen burning

element fuses into helium

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only process that can power our sun for 10 billion years

fusion

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sun is made primarily of

hydrogen

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sun’s composition

75% hydrogen, 25% helium, and 0.1% metals

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hydrogen fusion requires

ramming positively charged protons together at high speed to overcome electrical repulsion

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mass of four H nuclei is 1.007 times greater than

mass of one He nucleus, small difference is converted into energy

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where does fusion take place

the core