1.types of star clusters include
a. open clusters
b.elliptical cluster
c.spiral clusters
d.all of the above
2.elliptical galaxies contain
a. a lot of gas and dust
b.mostly red or yellow stars
c.mainly young stars
d.two of the above
3.types of galaxies include
a.spiral galaxies
b.circular galaxies
c.cluster galaxies
d.globular galaxies
4. the stars in an open cluster are mostly
a. old stars
b.reddish stars
c. young stars
d. two of the above
5.galaxies that do not have a clearl defined shape are called
a.deformed galaxies
b.dwarf galaxies
c. irregular galaxies
d.open galaxies
6.according to the big bang theory
a. dark matter is changigng to ordinary matter throughtout the universe
b.dark energy is pulling the universe into black holes
c.the universe will someday end because of a big bang
d.the universe began with an enormous explosion
7.from our point of view in the milky way galaxy all other galaxies in the universe appear to be ____________
a, crowding close together
b.getting dimmer
c.moving away from us
d. growing larger
8. after the big bang occured the universe
a.shrank size
b.became hotter
c.became denser
d.began to cool
9.most scientists who study dark matter think that it is
a. a mix of ordinary matter and matter we haven't yet discovered
b.matter that makes up black holes
c.just a tiny fraction of all the matter that exists in the universe
d. none of the above
10.scientist recently discovered that the universe
a.has started to contract size
b.is no longer expanding or conracting
c. is expanding even faster than before
d.will soon go through another big bang

paki sagot kailangan ko ito ehh