Astronomy Post Assessment

A person who studies objects in space is called a(n)

• astrologer
• astronomer
• cosmetologist
• telescopist

An apparent change in the spectrum of an object moving away from us is called the

• blue shift
• electromagnetic shift
• red shift
• sideways shift

The Big Bang model of an expanding universe is supported by

• blue-shifted spectra of stars and galaxies
• bright line spectra of nebulae and novas
• continuous spectra of stars and galaxies
• red-shifted spectra of stars and galaxies

What might an astronomer conclude if she noted that there was no longer any red shift observed in the radiation coming from all distant galaxies?

• The speed of light has decreased
• The speed of light has increased
• The universe was expanding
• The universe was no longer expanding

Our solar system is found in

• one of the spiral arms of the Milky Way galaxy
• the Andromeda galaxy
• the center of the Milky Way Galaxy
• the clouds of dust and gases that surround the Milky Way galaxy

The function of the spectroscope is to

• detect distant galaxies
• magnify distant objects
• separate light into its colors
• confirm daily horoscope predictions

A star would mostly begin life as

• a black hole
• blown-off sections of an already existing star
• a nebula
• old planets that have crashed together

Radio waves, infrared rays, visible light, ultraviolet rays and X rays are collectively called

• electromagnetic radiation
• low energy fields
• pulsars
• radioactivity

Galaxies farther from our Milky Way galaxy are moving away from each other

• faster than galaxies that are closer to ours
• slower than galaxies that are closer to ours
• at the same speed as galaxies that are close to ours
• at a rate that is so slow their movement cannot be identified

Hubble proposed that the universe is

• expanding in all directions at the same time
• expanding only in one direction
• shrinking toward the Milky Way galaxy
• remaining in the same position and at the same size