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Organizing the Stars

Total questions: 35

Worksheet time: 2hrs 39mins

Name
Class
Date
1.

What color represents a cool star

a)

Blue

b)

White

c)

Red

d)

Yellow

2.

What is luminosity?

a)

the amount of heat that a star gives off

b)

the color of the star

c)

the amount of energy a star emits

d)

a type of game that you play to build up your brain muscles.

3.

Which is the correct order for spectral classes?

a)

O, B, A, F, G, K, M

b)

M, K, G, F, A, B, O

c)

A, B, F, O, M, K, G

d)

B, F, O, G, K, A, M

4.

The temperature of the star is measured in what?

a)

Fahrenheit

b)

Celcius

c)

Kelvin

d)

Kilometers

e)

Newtons

5.

What is the spectral class our Sun is in?

a)

O

b)

M

c)

G

d)

F

e)

A

6.
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?
a)
Earth is a part of this galaxy
b)
Many more stars exist outside the galaxy
c)
The stars in the center of the galaxy are extremely small.
d)
The center of the galaxy consists of a dense cluster of stars.
7.
The universe has may different components.  Which list places four components of the universe in the most likely order from smallest to largest.
a)
Planets, Stars, Galaxies, Nebulae
b)
Nebulae, Stars, Planets, Galaxies
c)
Galaxies, Stars, Planets, Nebulae
d)
Planets, Stars, Nebulae, Galaxies
8.

Why does the sun appear brighter than the supergiant star Betelgeuse?

a)

the sun is a different color

b)

the sun is older

c)

the sun is closer

d)

the sun is made of different elements

9.

Which of the following types of star has the coolest temperature?

a)

O

b)

A

c)

M

d)

F

10.
If a star is being observed from Earth and it's light has shifted towards the blue side of the electromagnetic spectrum it would be...
a)
Moving towards the Earth
b)
Moving away from the Earth
c)
This is a trick question that cannot be answered
d)
It isn't a star, it is a very large blueberry.
11.
If a star is being observed from Earth and it's light has shifted towards the red side of the electromagnetic spectrum it would be...
a)
Moving towards the Earth
b)
Moving away from the Earth
c)
This is a trick question that cannot be answered
d)
It isn't a star, it is a very large blueberry.
12.
Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.
a)
It is not moving
b)
It is moving away from Earth (Redshift)
c)
It is moving towards Earth (Blueshift)
d)
It is moving towards Earth (Redshift)
13.
Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.
a)
It is not moving relative to Earth
b)
It is moving away from Earth (Redshift)
c)
It is moving towards Earth (Blueshift)
d)
It is moving towards Earth (Redshift)
14.
Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.
a)
It is not moving relative to Earth
b)
It is moving away from Earth (Redshift)
c)
It is moving towards Earth (Blueshift)
d)
It is moving towards Earth (Redshift)
15.
An object that is moving VERY fast away from Earth would have ________ than an object that is moving very slow away from Earth.
a)
More Redshift
b)
More Blueshift
c)
Less Redshift
d)
Less Blueshift
16.
An object that is moving VERY fast towards the Earth would have ________ than an object that is moving very slow towards the Earth.
a)
More Redshift
b)
More Blueshift
c)
Less Redshift
d)
Less Blueshift
17.

Most stars in our galaxy (and probably throughout the Universe) are in multiple-star systems.

a)

True

b)

False

18.

Using the law of gravity & orbital periods of binary stars - the mass of each star

a)

cannot be determined.

b)

can be calculated.

c)

changes depending on where the orbits are.

d)

can be calculated only if the spectral class is known.

19.

Sirius A & B are a good example of a _____ system.

a)

binary

b)

multiple

c)

star

d)

planetary

20.

A parsec is also a unit of distance (not time) and is equivalent to about

a)

1.36 light years.

b)

3.26 light years.

c)

19 light years.

d)

31 light years.

21.

With greater distance, the parallax angle

a)

increases

b)

decreases

c)

stays the same

22.

A star with a large parallax:

a)

is at a short distance from Earth.

b)

is moving at a great speed with respect to Earth.

c)

is at a great distance from Earth.

d)

is moving at a slow speed with respect to Earth.

e)

is not moving with respect to Earth.

23.

Which of the follow regarding parallax is not true?

a)

a star with a parallax of 1 arcsecond is 1 parsec away

b)

the parallax angle is measured in arcseconds

c)

it can only be used if the star is within 300 light years

d)

requires one stationary position of observation

e)

close stars have a higher parallax

24.

The luminosity of a star describes its ______________.

a)

brightness

b)

temperature

c)

age

d)

color

25.

What color are the hottest stars?

a)

blue

b)

red

c)

white

d)

yellow

26.

Star A and Star B have the same luminosity. Star B looks brighter in the night sky. Therefore, Star B is ______ than Star A.

a)

hotter

b)

closer

c)

more colorful

d)

brighter

e)

moving faster

27.

Star C and Star D have the same exact apparent brightness. But, Star C has a higher luminosity than Star D. Therefore, Star C is ______ than Star D.

a)

cooler

b)

closer to Earth

c)

more colorful

d)

farther from Earth

e)

moving faster

28.

Star E and Star F have the same parallax angle. But, Star E looks brighter than Star F. Therefore, Star E ______ than Star F.

a)

has a higher luminosity

b)

is closer to Earth

c)

is moving slower

d)

is farther from Earth

e)

has a lower luminosity

29.

In order to accurately determine the distance to another galaxy, you must look for ___________ within that galaxy.

a)

Type II supernovae

b)

emission nebulae

c)

variable stars

d)

gamma ray bursts

30.
What brightens and fades in a regular pattern? 
a)
The sun 
b)
A Cepheid variable 
c)
A shiny rock 
d)
Light year 
31.
Cepheid variables are examples of standard candles, stars whose intrinsic brightness we know for certain. 
a)
True
b)
False
32.
What is parallax?
a)
the angle formed by Earth and two celestial bodies located at 90 degrees from Earth
b)
the apparent difference in the position of an object, as we viewed from a different position
c)
the apparent difference in the position of an object, viewed at the same time each year
d)
the average distance between a celestial object and Earth
33.
What is the diameter of the Milky Way Galaxy in light years?
a)
1,000 LY
b)
10,000 LY
c)
100,000 LY
d)
1 Million LY
34.

What Galaxy is Earth located?

a)

Andromeda

b)

Milky Way

c)

Sagittarius

d)

Snickers

35.

Star G and Star H are the same distance to Earth. But, Star G has a higher luminosity than star H. Therefore, Star G ______ than Star H.

a)

is moving faster

b)

looks less bright

c)

is moving slower

d)

looks brighter

e)

is more redshifted

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