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Chapter 12, 8th Grade
Test Description: Galaxies and stuff
Instructions: Answer all questions to get your test result.
1) Patterns and pictures made from stars in the night sky are called
A
consternations
B
constellations
C
galaxies
D
imaginations
2) How many constellations are there?
A
88
B
18
C
22
D
45
3) Higher light wavelengths have ___ energy
A
fluctuating
B
higher
C
lower
D
the same amount of
4) What does the spectrum of a star tell us?
A
what a star is made of
B
all of the above
C
a star's age
D
the star's temperature
5) If a star has a negative apparent magnitude, what does this mean?
A
it appears very bright
B
it didn't do well at the reality fair.
C
it appears very dim
D
it is a medium-bright star
6) Luminosity depends on
A
a star's temperature and size
B
a star's age and size
C
a star's distance and temperature
D
a star's temperature and age
7) What powers stars?
A
nuclear fission
B
nuclear fusion
C
iron
D
fire
8) Which is NOT an inner layer of a star?
A
the radiative zone
B
the corona
C
the core
D
the convection zone
9) Which is NOT part of the atmosphere of a star?
A
the photosphere
B
the radiative zone
C
the chromosphere
D
the corona
10) How do most stars exist?
A
in multiple star systems
B
by themselves
C
near black holes
D
all of the above
11) Tight, spherical clusters of stars that are the same age and the same distance from Earth are called
A
spherical clusters
B
open clusters
C
elliptical clusters
D
globular clusters
12) Stars are classified by their
A
temperature
B
size
C
distance
D
spectra
13) A star's ___ determines its temperature and color
A
mass
B
magnitude
C
luminosity
D
distance
14) Which has the shortest life span?
A
they have equal life spans
B
mass has nothing to do with it
C
higher-mass stars
D
lower-mass stars
15) Why do higher-mass stars have short life spans?
A
the fuel is spread out over time
B
the color of the star determines its life span.
C
the more gravity that pulls inward, the hotter the core gets and the faster fuel is burned
D
the less fuel it has, the quicker it runs out
16) When do stars leave the main sequence?
A
when they run out of dust
B
when they no longer fuse hydrogen into helium
C
when they lose gravity
D
when they no longer fuse helium into carbon
17) Which star leaves the main sequence and turns into a red giant and later a white dwarf?
A
higher-mass star
B
lower-mass star
18) What holds galaxies together?
A
strong force
B
superglue
C
gravity
D
nuclear force
19) It is thought that more than 90% of the universe is made of
A
matter
B
ALIENS
C
dark matter
D
empty space
20) How are galaxies distributed throughout the universe?
A
none of the above
B
they are clumped together in clusters
C
they are mostly even, with a few groups here and there
D
they are spread out evenly
*select an answer for all questions
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