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WorksheetsComponents of Our Universe
Total questions: 24
Worksheet time: 13mins
Name
Class
Date
1.
What are the three types of galaxies?
a)
Spiral, Elliptical, Ambiguous
b)
Whirlpool, Ellipse, Irregular
c)
Spiral, Elliptical, Irregular
d)
Swirly, Fuzzy, Uh...
2.
Which is the oldest galaxy?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Milky Way
3.
Which is true of Elliptical Galaxies?
a)
They contain areas of new star formation and much gas and dust.
b)
They are older than other galaxies.
c)
Neither
d)
Both
4.
The presence of gas and dust tells scientists what about a galaxy’s age?
a)
The less gas and dust, the older the galaxy.
b)
Gas and dust are left over from old stars.
c)
Gas and dust are a product of fusion in middle aged stars
d)
Both A and B.
5.
What does the X axis represent on the Hertzsprung Russell Diagram:
a)
Star Temperature – increasing from left to right
b)
Color
c)
Brightness
d)
Star Temperature – increasing from right to left
6.
The Y axis on an HR Diagram represents:
a)
Luminosity
b)
Mass
c)
Temperature
d)
Type of Star
7.
The HR Diagram groups stars into:
a)
Type
b)
Age
c)
Size
d)
Temperature
8.
What determines a star’s progression through the life cycle?
a)
The color of the star
b)
The temperature of the star
c)
The amount of hydrogen in a star
d)
The size of the star at birth
9.
If a star is very bright, then
a)
its surface temperature is very low
b)
its size is very large
c)
it's using lots of hydrogen
d)
its surface temperature is very high
10.
What is a nebula?
a)
When the gases from a star gently disperse into space.
b)
A violent explosion of gas and dust into space.
c)
An interstellar cloud of dust, hydrogen, helium that eventually form a star.
d)
Gas and dust that create light through nuclear fusion.
11.
The sun is in what group?
a)
Red Giant
b)
Main Sequence
c)
Yellow Fission
d)
White Dward
12.
Why is the Sun a Main-Sequence Star?
a)
It is a medium size star
b)
It’s creating nuclear fission for energy.
c)
It’s using H to create nuclear fusion for energy.
d)
It’s the main star of our solar system.
13.
When will our Sun become a Red Giant?
a)
When it gets to be about 8 billion years old
b)
When it runs out of Helium
c)
When it becomes more massive
d)
When it runs out of Hydrogen
14.
How do astronomers define a light year?
a)
The distance light can travel in a year.
b)
The time it takes to travel across space.
c)
The distance light can travel in a day.
d)
The time it takes light to travel in a year.
15.
A star's color is determined by -
a)
Size
b)
Distance from Earth
c)
Surface Temperature
d)
Magnitude
16.
Compared to other stars, the sun is…
a)
Small
b)
Big
c)
Average
d)
Unimpressive
17.
What information is needed in order to determine the age of a star?
a)
Amount of hydrogen in the star.
b)
The age of a star
c)
The size of the star
d)
The stars color
18.
During which part of the life-cycle of a star is the star fusing hydrogen into helium?
a)
Supergiant
b)
White Dwarf
c)
Main Sequence
d)
Red Giant
19.
The correct order from longest to shortest wavelength:
a)
Radio, x-ray, visible light, microwave, UV, infrared, gamma
b)
Radio, microwave, infrared, visible light, UV, x-ray, gamma.
c)
Radio, infrared, microwave, visible light, x-rays, ultraviolet, gamma
d)
Radio, infrared, microwave, visible light, UV, x-ray, gamma
20.
Which rays have the less energy than ultraviolet, but cannot be seen?
a)
Gamma
b)
X-ray
c)
Visible
d)
Infrared
21.
Increased wave frequency yields…
a)
Increased energy
b)
Decreased wavelenth
c)
A blue shift
d)
All of the options
22.
If it takes light from the Sun only 8 minutes to reach earth, then the Sun is -
a)
8 light seconds
b)
8 light minutes
c)
8 light days
d)
8 light years
23.
If a star observed from Earth is “blue-shifted” it would indicate -
a)
its movement away from us.
b)
its movements toward us.
c)
it's moving very fast.
d)
it's moving very slow.
24.
We know the universe is expanding because we observe a ________ in the galaxies.
a)
A blue shift
b)
A red shift
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