Star Cycle
Star Properties
Hubble/Red Shift
Big Bang Theory
Hertzspung-Russell
100
gas and dust
What is stars made of?
100
what color of a star is the hottest?
white/blue
100
When ____ & ____ move toward or away it's frequency and wavelength changes.
sound or light
100
Astronomers theorize that the universe came into being at a single moment in an event called ____.
The Big Bang
100
What does H-R stand for?
Ejhar Hertzspung and Norris Russell.
200
gravity
What creates a star?
200
What mostly makes up a stars mass?
Hydrogen & helium.
200
Who created the Hubble Law?
Edwin Hubble
200
The Sun formed ____ years ago.
4.6 billion years ago
200
H-R diagrams are used to estimate the size of stars and their ____ and to infer how stars change over time.
Distances
300
The amount of ____ & ____ available when a star form determines the ____ of each young star.
Gas & dust. mass
300
The sun is a ____ sized star.
Average
300
The light from most galaxies undergoes ____.
red-shift
300
The Big Bang Theory describes how the ____ & ____ of the universe overtime could have led to the present universe of stars and galaxies.
Expantion and cooling.
300
About 90% of stars are found on the ____ ____.
Main sequence
400
What can escape a blackhole?
nothing
400
How are stars classified?
color, size & brightness
400
What shows the universe is expanding?
Observed red shift of galaxies.
400
How old is the universe?
13.7 billion years old.
400
The very bright stars at the upper right on the H-R diagram are called ____.
Supergiants
500
What is the cycle of a stars life?
nebula, protostar, main sequence, red giant, white dwarf, supernova, neutron star, blackhole.
500
How do scientist determine the mass of a star?
Observing gravitational interactions of stars that occur in pairs.
500
The red shift shows most galaxies are moving ____ ____ from Earth.
Further away
500
____ ____ can not be seen directly but it's presents can be detected by observing its gravitational effect on visible matter.
Dark Matter
500
A ____ ____ is the small, dense reamins of a low or medium mass star.
White dwarf
M
e
n
u