Answers2001310 Earth Science Sem 1 - PearsonStars

Stars Answers

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1
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How is the Sun classified?

A
as a giant star
B
as a medium star
C
as a white dwarf
D
as a neutron star
2
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Which factor causes gas and dust to pull together during the first stage of star formation?

A
density
B
gravity
C
heat
D
pressure
3

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
4

Which event takes place first in the stages before the birth of a star?

A
Gravity pulls gas and dust together.
B
A protostar forms as mass increases.
C
Nuclear fusion begins under high pressure.
D
A protostar collapses and becomes denser.
5

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.
6

Which object forms when a supergiant explodes?

A
a red giant
B
a protostar
C
a white dwarf
D
a neutron star
7

Which property of a star is closely related to its temperature?

A
brightness
B
color
C
composition
D
size
8

Which color are the hottest stars?

A
blue
B
orange
C
red
D
yellow
9

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

A
red giant
B
supergiant
C
white dwarf
D
main sequence star
10

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.

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