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10Stars produce light and heat due to the fusion of hydrogen atoms into helium.
A nebula contains only dust, no gases.
A protostar is formed before a star is fully born.
Nuclear fusion in stars requires a temperature of about 10 K to start.
Red giants are old stars with a cooler temperature than blue stars.
Only very small stars explode as supernovae.
The core of a massive star can become a black hole.
A white dwarf is formed from a star much larger than the Sun.
The color of a star shows its age and temperature.
Dust and gases from exploded stars can form a new nebula.
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Which is the main element found in a nebula?
What is the large explosion that occurs during the death of a star called?
Which is the correct order for the lifecycle of a star?
Where are stars born?
What fuels the light and heat of a star?
Which color is the hottest star?
What is a small, hot, dim star called?
Which star explodes as a supernova?
What forms after a supernova explosion?
Which object has gravity so strong that light cannot escape?
Stars are born in a giant cloud called a ______.
The main gases in a nebula are ______ and ______.
A star before fusion starts is called a ______.
Nuclear fusion produces ______ and ______ in a star.
Older stars that are red and large are called ______.
A very large red giant can explode as a ______.
A star with a mass less than the Sun becomes a ______ at the end of its life.
A star with 1.4–5 times the solar mass can become a ______.
A star with more than 5 times the solar mass can form a ______.
The Orion ______ is visible through powerful telescopes.