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Galaxies
Test Description: Grades 6-8 Earth Science
Instructions: Answer all questions to get your test result.
1) A ___ is an unbelievably huge clump of stars / solar systems.
A
universe
B
galaxy
C
nebula
D
blackhole
2) The stars in a galaxy are held together in a clump by ___.
A
nuclear fusion
B
a blackhole
C
electromagnetic radiation
D
gravity
3) A ___ is a huge cloud of gas and dust where new stars form.
A
universe
B
nebula
C
solar system
D
galaxy
4) Our solar system is part of the ___.
A
Milky Way Galaxy
B
Pinwheel Galaxy
C
Andromeda Galaxy
D
Sombrero Galaxy
5) After a galaxy uses up all of its ___, no new stars can form.
A
helium gas
B
oxygen gas
C
dust
D
hydrogen gas
6) The Milky Way is a ___ type galaxy.
A
elliptical
B
irregular
C
lenticular
D
spiral
7) Galaxies are classified/grouped based on ___.
A
their size
B
their age
C
their shape
D
how much dust and gas they contain
8) A ___ galaxy that has a thin, disc shape with curved arms spreading from its center (~pinwheel).
A
spiral
B
lenticular
C
irregular
D
elliptical
9) A ___ galaxy that has a round or football shape.
A
spiral
B
irregular
C
lenticular
D
elliptical
10) A ___ galaxy that has an odd or unusual shape.
A
irregular
B
spiral
C
lenticular
D
elliptical
11) A ___ galaxy has a disc shape - but does NOT have spiral arms.
A
elliptical
B
lenticular
C
spiral
D
irregular
12) Scientists estimate that the Milky Way contains hundreds of ___ (#) of individual stars.
A
thousands
B
billions
C
millions
D
trillions
13) The ___ is the bright, round, center part of a spiral galaxy where lots of stars are crowded close together.
A
nebula
B
halo
C
disc/spiral arms
D
bulge
14) The ___ is the thin, flat outer part of a spiral galaxy where stars are less crowded.
A
halo
B
disc/spiral arms
C
nucleus
D
bulge
15) The ___ is the far-out, cloud-like part of a spiral galaxy where clusters of stars are scattered very far apart.
A
bulge
B
disc/spiral arms
C
nebula
D
halo
16) The ___ is the Milky Way Galaxy's closest neighbor (at 2.5 million light years away).
A
Whirlpool Galaxy
B
Andromeda Galaxy
C
Pinwheel Galaxy
D
Sombrero Galaxy
17) In which part of a spiral galaxy are most new stars born?
A
nucleus
B
halo
C
bulge
D
disc/spiral arms
18) In which part of many large spiral galaxies can a supermassive blackhole be found?
A
nebula
B
halo
C
disc/spiral arms
D
bulge
19) Stars in the disc/arms of a spiral galaxy ___.
A
are more crowded together than the rest of the stars in the galaxy
B
are the oldest stars in the galaxy
C
orbit around the center bulge
D
together make more light than the rest of the stars in the galaxy
20) The ___ is everything that exists - EVERYTHING we know.
A
Local Group
B
Universe
C
Milky Way Galaxy
D
Virgo Supercluster
*select an answer for all questions
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