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Earth Science Chapter 30 Review Flashcards | StudBud
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Earth Science Chapter 30 Review
A pulsar is...
A spiral galaxy is...
Earth Science Chapter 30 Review
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Earth Science Chapter 30 Review
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1
A spiral galaxy is...
a star group of no particular shape
a star group with a nucleus of bright stars and arms of dust
a group of stars in a recognizable pattern
a star group elongated in shape
2
A pulsar is...
a neutron star that emits radio waves
an explosion that causes a star to become very bright
an object at the center of some galaxies
evidence of the big bang
3
What is absolute magnitude?
the true brightness of a star
the numerical size of a star
the brightness of the moon as it appears from Earth
the brightness of a star as it appears from Earth
4
Supernovas are...
hundreds of times more violent than novas
thousands of times less violent than novas
thousands of times more violent than novas
hundreds of times less violent than novas
5
What is a light-year?
the speed of light in a year
the time it takes to travel to a star
the distance light travels in a year
the distance to the sun
6
How does a main sequence star generate energy?
by nuclear fusion, converting helium to carbon
by nuclear fission, converting hydrogen to helium
by nuclear fission, converting helium to iron
by nuclear fusion, converting hydrogen to helium
7
A nova is...
pretty super
a shrinking spinning region of space
the birthplace of young stars
an explosion that causes a star to become very bright
8
What is apparent magnitude?
the brightness of a star as it appears from Earth
the true brightness of a star
the brightness of the moon as it appears from Earth
the numerical size of a star
9
White dwarfs...
are small, hot, and dim stars, about the size of Earth
may not exist
are small, hot, and dim stars about the size of the sun
are large, bright, and luminous
10
A constellation is...
a group of stars in a recognizable pattern
a large explosion that causes a star to become bright
a neutron star that emits radio waves
a star group with a nucleus of bright stars
11
Cosmic background radiation is...
a large explosion that causes a star to become bright
evidence of the big bang
a group of stars in a recognizable pattern
the speed of light in a year
12
Why do stars seems to move in the night sky?
because Earth is standing still
because the stars revolve around the Earth
because Earth is in motion
because of parallax
13
A quasar is...
a shrinking spinning region of space
a neutron star that emits radio waves
a large explosion that causes a star to become bright
an object at the center of some galaxies that makes energy
14
What makes up most of the universe?
dark energy and dark matter
black holes
known elements
planets
15
A protostar is...
evidence of the big bang
a shrinking spinning region of space
a region of dust and gas
a star group with very young stars
16
By analyzing the light that a star emits, astronomers can determine...
the galaxy that it belongs to
the constellation that it belongs to
its motion
its composition and temperature
17
An irregular galaxy is...
a star group with arms of young stars
a star group that is rich in dust and gas
a star group with a nucleus of bright stars
a star group in an elongated shape
18
The big bang was...
the theory that all matter is reconfigurating
the theory that all matter and energy exploded 14 bya
a large explosion that causes a star to become very bright
a shrinking spinning region of space
19
An elliptical galaxy is...
a shrinking spinning region of space with a center of matter
a star group elongated in shape
a neutron star that emits radio waves
a star group of no particular shape
20
What is important about Hubble's discovery of redshift in the spectra of galaxies?
it suggests that the universe is expanding
it proves the big bang theory
it suggest the existence of black holes
it suggests that the universe is contracting
