STARS!! Flashcards

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1
Q

STAR THAT DOES NOT CHANGE ITS POSITION IN THE SKY

A

POLARISSS

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2
Q

an interstellar cloud that is

rich in gases and dust in space.

A

stellar nebula

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3
Q

a stellar nebula consists of ?

A

92% hydrogen, 7% helium, and 1% heavier gases

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4
Q

It is formed as a result of pulling
the hydrogen gas in the nebula
together by gravity.

A

protostar

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5
Q

A ? is any star
that has a hot, dense core that
fuses hydrogen into helium to
produce energy.

A

main sequence star

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6
Q

Its life cycle is determined by its
mass—the larger its mass, the
shorter its life cycle; the smaller
its mass, the longer its life cycle.

A

main sequence star

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7
Q

It is formed when a main

sequence star runs out of
hydrogen in its core and no
longer generates heat by nuclear
fusion.

A

red giant

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8
Q

It is a region of cosmic gas and dust
formed from the cast-off outer layers of
a dying star.

A

planetary nebula

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9
Q

It is formed during the late stages of a
star’s life, typically when a star has used
up all its nuclear fuel and has expanded.

A

planetary nebula

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10
Q

It is formed once an average star
consumes its fuel.

A

white dwarf.

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11
Q

For lower-mass stars, the outer layers
are expelled to form a planetary
nebula, leaving behind a hot core called
a ?

A

white dwarf.

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12
Q

They are among the largest stars in
the universe.

A

red supergiant

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13
Q

They have relatively short life spans
compared to other types of stars.

A

red supergiant

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14
Q

“A star must be between ? and ? times
more massive than our Sun to have the

mass needed to become a red

supergiant.”

A

8, 40

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15
Q

It is an explosion that marks the end of
a star’s life.

A

supernova

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16
Q

It happens when the core of a massive
star collapses violently because fusion
is no longer taking place.

A

supernova

17
Q

It is an extremely dense form of
matter in which the nucleus is

made almost entirely of
neutrons.

A

neutron star

18
Q

It is an area of such immense

gravity that nothing—not even
light—can escape from it.

A

black hole

19
Q
A