Stars
Types of Stars
Galaxies
Life Cycle of stars
Miscellaneous
100
What is a ball of gas held together by gravity called?
A star.
100
What are 90% of stars?
Main sequence stars
100
Name one type of galaxy.
Spiral, Elliptical, Irregular
100
A cloud of gas is called what? (This is the first stage of the life cycle of a star)
Nebula or Stellar Nebula
100
What is hotter a red giant star or a white dwarf star?
White dwarf
200
What color is a cool star?
Blue
200
A white dwarf stars is made up of only what two elements?
Carbon and oxygen
200
What galaxy do we live in? (The name, not the type)
The Milky Way galaxy
200
How many different paths are there in a stars life cycle?
2 pathways
200
List the color of stars from hot to cool. (4 colors)
Blue, white, yellow, red.
300
What is the closest star to Earth?
The Sun.
300
Stars that are larger and cooler than main sequence stars are called?
Giant and super giant stars
300
What kind of galaxy is made up of older stars that are clumped close together?
Elliptical galaxy
300
What can a supernova turn into?
Black hole or neutron star.
300
What does an irregular galaxy mean?
It does not have a regular shape.
400
When the gravity in a nebula gets stronger, the cloud gets smaller. True or False?
True
400
When a giant star explodes, what star is formed?
Planetary nebulla
400
What kinds of stars make up the bulge of a spiral galaxy?
old stars
400
Write out the pathway of a a stars life cycle. (either one is fine, must include 5 names)
Stellar nebula, average star, red giant, planetary nebula, white dwarf.
Stellar nebula, massive star, red supergiant, super nova, black hole / neutron star.
400
A nebula is made up of what two elements?
Hydrogen and helium.
500
What does it mean if you say a star is the 'most luminous'?
It is the brightest star.
500
What kind of star is the Sun?
Main sequence star
500
What type of galaxy is this?
Irregular galaxy
500
Name the 3 possible final stages of a star's life cycle. List in order from largest to smallest in size.
Black hole, neutron star, white dwarf
500
What direction do stars appear to rise and fall in?
rise in the east, fall in the west