AnswersAZ-Earth and Space Science A SC301Stars

Stars Answers

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Which statements describe properties of stars? Check all that apply.

A
Stars produce energy through nuclear fusion.
B
Stars produce energy through gravity.
C
Stars are massive objects composed of gas.
D
Stars are solid objects that we could stand on.
E
Stars are composed primarily of hydrogen and helium.
F
Stars are composed primarily of liquids such as water.
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The color and temperature of stars are closely related. Which color star is the hottest?

A
black
B
red
C
yellow
D
blue
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6

Use the drop-down menus to identify which of these stars is the smallest, which is the largest, and which is in the middle. Supergiant: Neutron star: White dwarf:

Answers:
Selection 1:largest
Selection 2:smallest
Selection 3:middle
7

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10

Which statements describe how stars are born? Check all that apply.

A
Stars are born in clouds of gas and dust called nebulas.
B
The gas and dust are pulled together by gravity.
C
If the cloud that is pulled together has enough mass, a red giant is formed.
D
The pulled-together cloud collapses and becomes hot and dense.
E
Heat and pressure cause nuclear fusion, which signals the birth of a star.
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13

Use the drop-down menus to complete the statements about the death of stars. When a supergiant explodes, a occurs. A supernova may leave behind a , which is the size of a large city. When the outer portion of a red giant expands and is blown away, a is left behind. The most-massive stars may become , which are not directly detectable.

Answers:
Selection 1:supernova
Selection 2:neutron star
Selection 3:white dwarf
Selection 4:black holes
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19

Which elements can be made in the core of a star after the hydrogen is used as fuel? Select four answers.

A
iron
B
gold
C
silicon
D
carbon
E
oxygen
F
hydrogen

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