AnswersAZ-Earth and Space Science A SC301Stars

Stars Answers

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1
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Which characteristic is used to measure the amount of light radiated by a star?

A
size
B
color
C
luminosity
D
temperature
2
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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

Which factor causes gas and dust to pull together during the first stage of star formation?

A
density
B
gravity
C
heat
D
pressure
6

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.
7

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
8

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

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

Which object forms when a supergiant explodes?

A
a red giant
B
a protostar
C
a white dwarf
D
a neutron star
10

Which object is created during the formation of a star?

A
a nebula
B
a protostar
C
a supergiant
D
a supernova

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