Waves
The top of a wave is called this
Crest
all stars are "born" here
nebula
which galaxy has "arms" to it?
spiral galaxy
The universe is approximately this old
14 billion years old
what wave type has the highest frequency
gamma rays
distance between two wave tops
wavelength
a small main sequence star will become this
red giant
Which galaxy does not have a defined shape?
irregular galaxy
objects moving away from us appear to be ____ shifted
red shifted
what wave has the longest wavelength
radio waves
height of a wave
amplitude
the two most common elements in stars
hydrogen and helium
which galaxy is just round
elliptical
objects moving toward us appear to be ____ shifted
blue shifted
which has a higher amount of energy, red or blue?
blue
bottom of a wave
trough
which star is hotter, a blue star or a red star?
blue star
what galaxy do we live in
milky way
a galaxy is 2.6 million light-years away. How long will it take for that light to reach us on earth?
2.6 million years
what is the relationship between wavelength and energy (give example)
long wavelength = small amount of energy
short wavelength = high amount of energy
amount of waves per second
frequency
in main sequence stars, this process creates larger elements from small ones
nuclear fusion
our galaxy is part of this "group"
local group
This "background radiation" is one piece of evidence for the big bang theory
cosmic microwave background radiation
what is the relationship between wavelength and frequency
as one increases, the other decreases
(increase wavelength, decrease frequency; decrease wavelength, increase frequency)