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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Illustration showing the transformation of a nebula into a protostar.

What pulls the gas and dust in a nebula together, to form a protostar?

The attraction of gravity

The electrostatic attraction between particles

Space pressure

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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 protostar dissipates back into a nebula

The temperature increases

The star explodes

Nuclear fusion could initiate

It becomes more dense

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Once nuclear fusion starts in a protostar, what does it become?

A supernova

A black hole

A white dwarf

A main sequence star

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inward / outward / sideways


The energy released from nuclear fusion creates an pressure that balances against the pressure from gravity.

outward
inward

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2

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)

Protostar

Red giant

Main sequence star

Nebula

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Image showing a star in the main sequence phase with an arrow pointing to a question mark, indicating the star's potential future stages.

After the main sequence, what could a star become?

A red giant

A brown giant

A red super 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

main
helium
super
supernovas

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4

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 black dwarf and then a white dwarf

It becomes a white dwarf and then a black dwarf

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Image showing a red super giant star with an arrow pointing to a question mark, representing the next stage in the star's lifecycle.

For a red super giant, what happens next in the star's lifecycle?

It explodes as a supernova

It becomes a black dwarf

It becomes a white dwarf

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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.

giant
elements

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2

What two alternative things might happen to a star after a supernova explosion?

Become a black dwarf

Become a white dwarf

Condense into a neutron star

Collapse into a black hole

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Diagram showing the life cycle of stars with labels for main sequence star, neutron star, white dwarf, protostar, supernova, and black dwarf.

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:

B
F
C
A
E
D

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