The life cycle of stars

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  • Created by: Lina
  • Created on: 07-04-14 14:34
Stars initally form from...
clouds of gas and dust
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The force of gravity makes the gas+ dust spiral together to form a...
protostar
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Grav. energy is converted into... energy, so...
Heat; temperature rises
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When the temperature gets high enough,
hydrogen nuclei undergo nuclear fusion to form helium nuclei
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This nuclear fusion gives out massive amount of...
Heat and light
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After a star is born, smaller masses of gas+ dust may...
Pull together to form planets that orbit the star
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The star immediately enters a...
Long stable period
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The heat created by the nuclear fusion..
Provides an outward pressure to balance the force of gravity pulling everything inwards
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The star maintains its energy output for millions of years due to ...
The massive amounts of hydrogen it consumes
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In this stable period, the star is called a ...
Main sequence star
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Eventually, the hydrogen begins to run out+....
Heavier elements like iron are made by nuclear fusion of helium
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The star then swells into a... if it is a small star
Red Giant
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The star then swells into a ... if it is a big star
Red Super Giant
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The star becomes red because...
the surface cools
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A small star becomes unstable+...
ejects its outer layer of dust+ gas- planetary nebula
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This leaves behind a hot, dense solid core-
A white dwarf
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A white dwarf cools down to a...
Black dwarf and eventually disappears
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Big stars start to glow brightly as they...
undergo more fusion+ expand+ contract, forming heavy elements like iron in nuclear reactions
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The stars explode in a...
Supernova, forming elements heavier than iron+ ejecting them into the universe to make planets+ stars
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The exploding supernova throws the outer layers of dust+ gas into space, leaving a very dense core, called...
Neutron Star
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If the star is big enough, the neutron star will become a...
Black hole
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Other cards in this set

Card 2

Front

The force of gravity makes the gas+ dust spiral together to form a...

Back

protostar

Card 3

Front

Grav. energy is converted into... energy, so...

Back

Preview of the front of card 3

Card 4

Front

When the temperature gets high enough,

Back

Preview of the front of card 4

Card 5

Front

This nuclear fusion gives out massive amount of...

Back

Preview of the front of card 5
View more cards

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