Chapter 30 Test

What color are the coolest stars?

• orange

• blue

• white

• red

Stars appear to move in the sky because

• the sky is rotating.

• Earth is moving.

• the universe is expanding.

• galaxies are forming.

Tags

NGSS.MS-PS2-4

A star moving away from Earth has a spectrum that is

• losing its color.

• shifted toward blue.

• shifted toward red.

• unchanged.

Tags

NGSS.HS-ESS1-2

Scientists determine the composition and temperature of stars

• by sampling matter on the surface of stars.

• by analyzing the vibrations that stars emit

• through magnetic testing

• by analyzing the spectra of the light that stars emit.

Tags

NGSS.HS-ESS1-2

A small, hot, extremely dense core left after a star collapses is a

• red giant.

• pulsar.

• nova.

• white dwarf.

During the main-sequence stage, how is energy generated in a star's core?

• hydrogen fuses into helium

• carbon fuses into hydrogen

• helium fuses into hydrogen

• carbon fuses into oxygen

Tags

NGSS.HS-ESS1-1

After a protostar's temperature rises to 10,000,000 degrees Celsius, it becomes a star when

• nuclear fusion ends.

• nuclear fusion begins.

• nuclear fission begins.

• nuclear fission ends.

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NGSS.HS-ESS1-1

A large, bright star whose hot core has used most of its hydrogen is a

• nova.

• supernova.

• red giant.

• pulsar.

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NGSS.HS-ESS1-3

What did Hubble discover in the 1920s?

• red shift in spectra of galaxies

• blue shift in spectra of galaxies

• the existence of black holes

• the existence of giant stars

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NGSS.HS-ESS1-2

The big bang occurred about

• a billion years ago.

• 5 billion years ago.

• 14 million years ago.

• 14 billion years ago.

Tags

NGSS.HS-ESS1-2