Universe and Stars Review

If a galaxy is moving toward Earth, the EMR waves reaching Earth would be _______ shifted.

The _______ diagram compares the temperature and absolute magnitude of stars.

The Big Bang Theory explains where the singularity that became our universe came from.

According the H-R Diagram, the hottest and brightest stars are...

The various types of EMR and their range of frequencies and wavelengths is described by _______.

A bundle or unit of electromagnetic energy given off when an electron returns to its original energy level is called...

Most characteristics of a star: color, brightness, temperature, life span, what elements it can fuse depend on _______.

_______ refers to how bright a star actually is, or its brightness at a standard distance from Earth.

The distance from one wave crest to another is called _______.

_______ is how bright a star appears from Earth.

Dark matter plays a role in galaxy formation because it...

_______ states that galaxies are moving away from Earth at speeds proportional to their distance.

A _____ forms when material with about 3 times the mass of the sun is left behind after a supernova explosion.

_______ stars are the hottest, _______ are in the middle, and _______ are the coolest.

The Big Bang was an explosion, similar to an atomic bomb.

Shorter wavelength of EMR have _______.

A _______ is the distance light can travel in one year, about 5.8 trillion miles.

Stars are formed from...

How long after the Big Bang did the strong nuclear force cause the first nuclei to form?

A device that breaks down visible light into its individual wavelengths is called a _______.

Hubble observed that most galaxies in the universe were...

Fusion in the core of stars releases energy because...

The blue-white hot core of material that remains after a small or medium mass star dies is called a _______.

A ______ forms when material with 5+ times the mass of the sun is left behind to collapse after a supernova explosion.

_______ refers to the number of wave crests that pass a specific point in a given time.

A star lives most of its life as a _______.

The singularity that became our universe appeared in existing space and almost immediately began a rapid expansion.

_______ states that our universe was once an intensely hot, extremely dense point smaller than an atom.

According to the spectral lines, the Bear Galaxy is...

Larger mass stars have _______ life spans compared to smaller mass stars.

A steady stream of photons is called _______.

The process, that occurs in the core of stars, that combines nuclei to make larger nuclei is called _______.

The two most abundant elements in the modern universe are...

An observer hears a lower frequency that what was emitted when a wave source is moving away from them because...

If a galaxy is moving away from Earth, the EMR waves that reach Earth will be _____ shifted.

A star is formed when a collapsing nebula...

When an excited electron returns to its original energy level, a/an _______ is given off.

Stars in the upper, right quadrant of the H-R diagram would be...

A region or zone where our physical laws to not apply is called a _______.

How long after the Big Bang did complete atoms form in the universe?

Which of the following is not evidence for the Big Bang Theory?

Galaxies are though to have formed in _______ regions of the universe.

A star begins to die when...

The heavy elements up to iron are/were formed...

Which of the following is true of stars?

Astronomers can determine the composition of star by...

The change in frequency of a wave observed when the source of a wave is moving relative to an observer is called ______.

A _______ galaxy is one where new star formation is common in the arms but not in the central bulge.

Elements heavier than iron are/were formed...

Fusion comes to an immediate stop when a star begins fusing _______.