The big bang theory

What best describes the doppler effect?

• When light changes color

• When sound changes pitch

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer

• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

If a star is being observed from Earth and it's light has shifted towards the red side of the electromagnetic spectrum it would be…

• It isn't a star, it is a very large blueberry.

• Moving towards the Earth

• Moving away from the Earth

• This is a trick question that cannot be answered

The vast majority of galaxies in our universe are moving away from us. We know this because we observe __________ in the galaxies absorption spectra.

• Turbulence

• Blueshift

• Superposition

• Redshift

Which discovery(ies) came from our understanding redshift/ blueshift?

• The universe is expanding

• Most galaxies are moving away from us

• Andromeda galaxy will collide with the Milky way in 3.75 billion years

• All of the above

______ is a force that causes dust particles to stick together in a nebula

• nuclear Fusion

• Gravity

• Hydrogen

• iron

What is the most popular hypothesis of the formation of the moon?

• The moon passed very close to the earth and was caught in its gravitational pull.

• The moon formed the same time as the earth.

• The moon formed when a small planet smashed into the newly formed earth sending debris into space which formed the moon.

• None of the above

Which statement is true?

• The galaxies are moving toward us.

• The galaxies are moving away from us.

• The universe remains static or unchanged in motion.

• None of the above

Light emitted from a star or galaxy can be separated into a band of colors, called a ________.

• Red Shift

• Wave Length

• Spectrum

• Microwave