Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
What is a nebula?
A large cloud of dust and gas
A star at the end of its life
A young star
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What pulls the gas and dust in a nebula together, to form a protostar?
Space pressure
The electrostatic attraction between particles
The attraction of gravity
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As a protostar grows in size and attracts more particles from the surrounding nebula, what changes may take place within it?
(Select all that apply)
The temperature increases
Nuclear fusion could initiate
It becomes more dense
The star explodes
The protostar dissipates back into a nebula
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Once nuclear fusion starts in a protostar, what does it become?
A main sequence star
A black hole
A white dwarf
A supernova
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inward / outward / sideways
The energy released from nuclear fusion creates an pressure that balances against the pressure from gravity.
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What stage of a star's life cycle is the sun currently in?
(Only the star at the centre of our solar system is called the 'sun'. All other stars are just stars)
Red giant
Nebula
Main sequence star
Protostar
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After the main sequence, what could a star become?
A red super giant
A brown giant
A red giant
A green giant
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It's important that you know which elements nuclear fusion forms at each stage of a stars life cycle.
A sequence star only fuses together hydrogen to make .
Then in red giants or red giants, nuclear fusion can form heavier elements up to iron on the periodic table.
Elements heavier than iron are formed by .
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For a red giant, what happens next in the star's lifecycle?
It collapses into a black hole
It becomes a neutron star
It becomes a white dwarf and then a black dwarf
It becomes a black dwarf and then a white dwarf
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For a red super giant, what happens next in the star's lifecycle?
It becomes a white dwarf
It becomes a black dwarf
It explodes as a supernova
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sky / universe / giant / elements
A red super eventually explodes into a supernova. This can form even heavier than iron. These elements are ejected all across the universe.
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What two alternative things might happen to a star after a supernova explosion?
Condense into a neutron star
Become a black dwarf
Collapse into a black hole
Become a white dwarf
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Match the letters A to F on the diagram above with the following labels:
Main sequence star:
Neutron star:
White dwarf:
Protostar:
Supernova:
Black dwarf:
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