Life cyle of stars
The life cyle of stars revision notes.
- Created by: katielouisew97
- Created on: 21-04-14 12:05
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- Life cycle of stars
- stars form when dust and gas gathers together because of gravitational force
- Nuclear energy release energy to keep the stars hot
- A star forms when the temperature is hot enough for the hydrogen nuclei to fuse together to make helium
- The fusion process releases energy which keeps the star core hot.
- A star forms when the temperature is hot enough for the hydrogen nuclei to fuse together to make helium
- During the stable phrase of a star the force of gravity holding the star is balanced by the high pressure due to high temperatures. IE. The sun is in the stable phrase
- A star first starts of as a pro-star.
- When all the Hydrogen has been used up in the fusion process larger nuclei may begin to form and the star can expand to become a red giant.
- when all the nuclear reactions happen over a small star like our sun, the star may contract under the pull of gravity. This becomes a white dwarf which fades and changes color as it cools.
- A larger star with more mass will go on making reactions, getting hotter and expanding until it explodes.
- This creates a supernova which eventually turns into a black hole
- When all the Hydrogen has been used up in the fusion process larger nuclei may begin to form and the star can expand to become a red giant.
- Nuclear energy release energy to keep the stars hot
- Nuclear Fission
- Nuclear fission involves two atomic nuclei joining to make a large nucleus. When this happens energy is released.
- The sun and other stars use nuclear fission to release energy.
- Hydrogen nuclei join to form helium nuclei
- The sun and other stars use nuclear fission to release energy.
- Nuclear fission involves two atomic nuclei joining to make a large nucleus. When this happens energy is released.
- stars form when dust and gas gathers together because of gravitational force
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