WorksheetsExam Review-Galaxies and the Universe
Total questions: 10
Worksheet time: 14mins
Name
Class
Date
1.
Cosmic Microwave Background Radiation (CMBR, or CBR) supports the Big Bang Theory because
a)
all galaxies are moving closer together.
b)
the observed microwave temperature matches with predictions of the theory.
c)
all galaxies are not moving apart at all.
d)
the microwaves are getting higher in temperature as the Universe ages.
2.
Starlight from far away galaxies is increasing in wavelength (red shifted), which shows that
a)
galaxies are moving together as the Universe collapses.
b)
galaxies move with no predictable pattern at all.
c)
those stars may be ready to go supernova!
d)
galaxies are moving away from each other as the Universe expands.
3.
No scientists really know what the components (make up) of dark matter are in our Universe.
a)
True
b)
False
4.
The fact that most galaxies are observed to be moving away from each other is supporting evidence for The Big Bang Theory.
a)
True
b)
False
5.
Stars are known as blackbody (even though they're not black) radiators because observing their visible color allows their actual temperature to be calculated.
a)
True
b)
False
6.
How is matter organized throughout our Universe?
a)
Matter is repelled from centers of gravity in the Universe.
b)
Matter is attracted to centers of gravity (dark matter) within the Universe.
c)
Matter is randomly scattered in the Universe.
d)
Matter is clumped around the center of the Universe.
7.
Which force affects the motion of planets, moons, stars and galaxies in the Universe?
a)
Strong nuclear force
b)
Weak nuclear force
c)
Gravity
d)
Electromagnetism
8.
What star type is located in the central diagonal area of an H-R diagram?
a)
Dwarf stars.
b)
Red Giants.
c)
Main-sequence stars.
d)
Blue Giants.
9.
What star type is located in the lower left area of an H-R diagram?
a)
Blue Giants.
b)
Main-sequence stars.
c)
Red Giants.
d)
Dwarf stars.
10.
Which choice orders celestial (space) objects from smallest to largest?
a)
Stars--> Galaxies-->Planets--> Moons
b)
Moons--> Planets--> Stars--> Galaxies
c)
Universe--> Moons--> Stars--> Planets
d)
Star--> Moons-->
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