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Stars Answers

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1
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What happens first when a star begins to run out of fuel?

A
The star’s core shrinks.
B
The star becomes a black hole.
C
The star becomes a white dwarf.
D
The star’s outer layer drifts away.
3

How do spectrographs help astronomers classify stars?

A
They determine the size of stars.
B
They evaluate the color of stars.
C
They measure the brightness of stars.
D
They analyze the composition of stars.
4

What is the main element that stars are made of?

A
helium
B
hydrogen
C
magnesium
D
sodium
5

What causes a star to shine brightly?

A
the color that is produced
B
the energy that is released
C
the amount of gravity that is present
D
the types of elements that are present
6

What is the initial stage of all stars?

A
nebula
B
black hole
C
supernova
D
white dwarf
7

What is the Sun classified as on the Hertzsprung-Russell diagram?

A
red giant
B
supergiant
C
white dwarf
D
main sequence star
9

Some objects in space are created from clouds of gas and dust.What will happen if the cloud does not have enough mass?

A
A core will form.
B
A star will not form.
C
A protostar will form.
D
A nebula will not form.
10

Which event signals the birth of a star?

A
A core shrinks and explodes in a supernova.
B
A protostar collapses, becoming dense and hot.
C
Extreme heat and pressure causes nuclear fusion.
D
A mass of gas and dust grows and forms a protostar.

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