Answers2001310 Earth Science Sem 1 - ReevesStars

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Which object is created during the formation of a star?

A
a nebula
B
a protostar
C
a supergiant
D
a supernova
2
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What is the main element that stars are made of?

A
helium
B
hydrogen
C
magnesium
D
sodium
3

Which object forms when a supergiant explodes?

A
a red giant
B
a protostar
C
a white dwarf
D
a neutron star
4

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

A
size
B
color
C
luminosity
D
temperature
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

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

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.
8

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.
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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