Stars Answers

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Which statements describe properties of stars? Check all that apply.Stars produce energy through nuclear fusion.Stars produce energy through gravity.Stars are massive objects composed of gas.Stars are solid objects that we could stand on.Stars are composed primarily of hydrogen and helium.Stars are composed primarily of liquids such as water.

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.
140928

✔ smallestlargest middle

A
✔ smallest
B
largest
C
middle
140929

smallest largest ✔ middle

A
smallest
B
largest
C
✔ middle
140930

Use the drop-down menus to complete the statements about the death of stars.

Answers:
When a supergiant explodes, a occurs.:supernova
A supernova may leave behind a , which is the size of a large city.:neutron star
When the outer portion of a red giant expands and is blown away, a is left behind.:white dwarf
The most-massive stars may become , which are not directly detectable.:black holes
140931

✔ neutron starwhite dwarf black hole

A
✔ neutron star
B
white dwarf
C
black hole
140932

neutron star black hole ✔ white dwarf

A
neutron star
B
black hole
C
✔ white dwarf
140933

✔ black holesneutron stars white dwarfs

A
✔ black holes
B
neutron stars
C
white dwarfs
140935

Which statements describe how stars are born? Check all that apply.Stars are born in clouds of gas and dust called nebulas.The gas and dust are pulled together by gravity.If the cloud that is pulled together has enough mass, a red giant is formed.The pulled-together cloud collapses and becomes hot and dense.Heat and pressure cause nuclear fusion, which signals the birth of a star.

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.
140936

This image shows a nebula. What would most likely be found in a nebula?

A
a white dwarf
B
a neutron star
C
a protostar
D
a red giant
140937

Which statements describe the death of stars? Check all that apply.A star’s final stages of life depend on its mass.Stars die when they run out of fuel.When a star starts to die, its core expands.The outer portion of the star contracts.All stars become black holes when they die.

A
A star’s final stages of life depend on its mass.
B
Stars die when they run out of fuel.
C
When a star starts to die, its core expands.
D
The outer portion of the star contracts.
E
All stars become black holes when they die.
140939

Use the drop-down menus to complete the statements about the death of stars.

Answers:
When a supergiant explodes, a occurs.:supernova
A supernova may leave behind a , which is the size of a large city.:neutron star
When the outer portion of a red giant expands and is blown away, a is left behind.:white dwarf
The most-massive stars may become , which are not directly detectable.:black holes

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