Stars are born in clouds and die in two very different ways. A star like the Sun fades quietly to a glowing ember, while a giant goes out in a single colossal explosion, leaving something far stranger behind.
A star forms from a nebula collapsing under gravity into a protostar, then a stable star powered by fusion. A Sun-like star later swells into a red giant and ends as a white dwarf, while a much more massive star becomes a red supergiant, explodes as a supernova, and leaves a neutron star or a black hole.
A star forms from a cloud of gas and dust (a nebula) that collapses under gravity into a protostar, becoming a stable star when fusion begins.
Massive: red supergiant → supernova → neutron star or black hole. The ending depends on the star’s mass.
Watch a star form, live, and end in one of two ways depending on its mass.
Four quick checks. Each correct answer earns XP and lights this skill on your star map.
A star forms from a cloud of gas and dust called a...
Before nuclear fusion begins, the collapsing cloud is a...
A star like the Sun finally ends its life as a...
A much more massive star ends its life in a...
A Sun-like star fades to a white dwarf; a massive star explodes as a supernova.
| Star like the Sun | Much more massive star |
|---|---|
| Nebula, then protostar, then stable star | Nebula, then protostar, then stable star |
| Swells into a red giant | Swells into a red supergiant |
| Sheds its layers, leaving a white dwarf | Explodes as a supernova |
| Ends as a white dwarf | Leaves a neutron star or a black hole |
How a star ends depends on its mass. A star like the Sun becomes a red giant then a white dwarf, but a much more massive star explodes as a supernova and leaves behind a neutron star or a black hole.
Unlocks once the four checks above are done. Worth more XP, written in the style of Paper 2.
What determines whether a star ends as a white dwarf or as a supernova?
After a supernova, the remaining core may become...
Which sequence is correct for a star like the Sun?
The life cycle of a star is mapped. Keep the chain going.