What did Hubble discover in the 1920s?

red shift in spectra of galaxies

blue shift in spectra of galaxies

Red shift in the spectra of galaxies told Hubble that

matter and energy are being absorbed by black holes.

the universe is composed primarily of red light.

What is a light year?

the distance light travels in a year

the time it takes to travel to a star

are small, hot and dim stars about the size of Earth

are small, hot and dim stars about the size of the sun

thousands of times more violent than novas.

thousands of times less violent than novas.

hundreds of times more violent than novas.

hundreds of times less violent than novas.

How does a main sequence star generate energy?

by nuclear fusion, converting hydrogen to helium in its core.

by nuclear fission, converting hydrogen to helium in its core.

by nuclear fusion, converting helium to carbon in its core.

by nuclear fission, converting helium to iron in its core.

What is apparent magnitude?

the brightness of the moon as it appears from Earth

the brightness of a star as it appears from Earth

What is absolute magnitude?

the brightness of the moon as it appears from Earth

What is important about Hubble's discovery of the red shift in the spectra of galaxies?

It suggests that the universe is expanding.

It suggests that the universe is contracting.

It suggests the existence of black holes.

What are constellations?

apparently fixed, recognizable patterns of stars and the regions of space around them

recognizable groups of galaxies and the regions of space surrounding them

patterns of stars and galaxies that can be identified with color spectra

groups of stars that can only be distinguished with special equipment

What can parallax be used to calculate?

the distance to a star within 1,000 light-years of Earth

the composition of stars based on the spectra of their starlight

the temperature on the surface of a star within 1,000 light-years of Earth

the distance to extremely distant stars

What is an irregular galaxy?

a galaxy with no particular shape

a galaxy shaped like a stretched out football

a galaxy that has vast areas without stars

a galaxy that has high mass and is rich in dust and gas

An elliptical galaxy contains few

old stars, has little dust and gas and is elongated.

old stars, is rich in dust and gas and is elongated.

young stars, has little dust and gas and is elongated.

young stars, is rich in dust and gas and is elongated.

A spiral galaxy has a nucleus of

dim stars and has spiral arms consisting of billions of old stars.

dim stars and has spiral arms consisting of billions of young stars.

bright stars and has spiral arms consisting of billions of young stars.

bright stars and has sprial arms consisting of billions of old stars.

Chapter 30 Test Quiz

30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What color are the coolest stars?

orange

blue

white

red

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

red giant.

pulsar.

nova.

white dwarf.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

Tags

NGSS.HS-ESS1-1

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Chapter 30 Test

What color are the coolest stars?

Stars appear to move in the sky because

A star moving away from Earth has a spectrum that is

Scientists determine the composition and temperature of stars

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

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

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

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

What did Hubble discover in the 1920s?

The big bang occurred about

Access all questions and much more by creating a free account

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