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Electromagnetic Spectrum Star Spectra

Total questions: 16

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

What happens when you shine a light through a prism?

a)

The prism absorbs the light

b)

The amount of light is low density

c)

There is a continuous spectra of light

d)

There is no light that shines through

2.
What best describes the doppler effect?
a)
An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
b)
When sound changes pitch
c)
When light changes color
d)
An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.
3.
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.
4.

The vast majority of stars in our universe are moving away from us.  We know this because we observe a __________ in the stars spectra.

a)

Redshift

b)

Blueshift

c)

Turbulance

d)

Superposition

5.
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)
6.
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)
7.
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
8.
When redshift occurs, the perceived WAVELENGTH of the wave would...
a)
Increase
b)
Decrease
c)
Stay the same
d)
Make squirrell sounds
9.
What happens to the electrons of an atom when they get energized?
a)
They move to lower energy levels
b)
They move permanently to higher energy levels 
c)
They move temporarily to higher energy levels
d)
They fly off the atom completely
10.
What happens when the electrons fall back to lower energy levels?
a)
They release protons and neutrons
b)
They lose energy in the form of light
c)
They gain energy bounce back
d)
They lose energy and go completely dark
11.

How do scientists know that stars are moving?

a)

The Doppler Effect

b)

Emission Lines

c)

Radio Waves

d)

The Electromagnetic Spectrum

12.
What gases are in the unknown mixture?
a)
Gas B & Gas D
b)
Gas C & Gas B
c)
Gas A & Gas D
d)
Gas D & Gas C
13.
All electromagnetic waves have the same...
a)
frequency
b)
speed
c)
wavelength
d)
energy
14.

We primarily use emission/absorption spectra to identify ____________ of stars.

a)

chemical composition

b)

temperature

c)

luminosity

d)

distance

15.
This unknown star contains 
a)
beryllium
b)
copper
c)
manganese
d)
strontium
16.

By studying the spectra of stars, scientists were able to see redshifting, indicating the universe is ____________

a)

shrinking

b)

expanding

c)

not moving

d)

static

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