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WorksheetsEm Spectrum
Total questions: 21
Worksheet time: 27mins
Name
Class
Date
1.
By comparing the actual brightness of a star to its apparent brightness astronomers can determine a star's
a)
distance from earth
b)
diameter in kilometers
c)
age compared to the Sun
d)
mass to the nearest kilogram
2.
Astronomers can determine the chemical composition of stars by observing which of the following?
a)
Speed of rotation of the star at its equator
b)
Wavelengths of light emitted by the star
c)
Time the star takes to move through the night sky
d)
The season of the year in which the star is seen
3.
The wavelengths of light emitted by a star can provide information on all of the following characteristics of a star EXCEPT -
a)
temperature of the star
b)
direction of movement of the star
c)
chemical composition of the star
d)
number of planets orbiting the star
4.
A nebula is a cloud of dust in space that does not emit any light. How can astronomers use spectral analysis to determine the composition of a nebula?
a)
Sending high energy light waves to the nebula that reflect back to Earth
b)
Analyzing the light from stars behind the nebula which passes through.
c)
Using the composition of cloud in Earth's atmosphere as a model
d)
Collecting samples of a nebula that happen to reach our solar system
5.
The spectrum for visible wavelengths emitted by Star X is compared to the emission spectra of four different elements. According to the spectral analysis data, which element is present in Star X?
a)
Hydrogen
b)
Carbon
c)
Neon
d)
Magnesium
6.
All observable objects outside our galaxy, when viewed from Earth, have their spectra shifted to slightly longer wavelengths. Astronomers have concluded that this is evidence that all objects in the universe are -
a)
hotter than our Sun.
b)
moving away from each other.
c)
older than our solar system.
d)
absorbing radiation from stars.
7.
Which of the following characteristics of elements is used by astronomers to determine the chemical composition of distant stars? All elements -
a)
are composed of smaller particles, such as protons.
b)
can be found on the Periodic Table of Elements.
c)
emit certain wavelengths of light when heated.
d)
are able to combine with others to form compounds.
8.
The diagram provided gives information that relates the strength of the spectral lines of various elements, which may be detected in a star and used to predict the surface temperature of the star. Which of the following would be a reasonable prediction for the surface temperature of a star whose emission spectrum had strong silicon (Si) and magnesium (Mg) lines?
a)
20,000 degrees Kelvin
b)
30,000 degrees Kelvin
c)
5,000 degrees Kelvin
d)
2,500 degrees Kelvin
9.
electromagnetic waves with the longest wavelengths are
a)
gamma rays
b)
x-rays
c)
infrared waves
d)
radio waves
10.
which of the following does NOT belong in the electromagnetic spectrum:
a)
X-ray
b)
sound wave
c)
ultra violet rays
d)
microwaves
11.
Which waves are the type that can give us suntans and sunburns?
a)
Infrared radiation
b)
Ultraviolet radiation
c)
Radio waves
d)
X-rays
12.
In visible light, which color has the longest wavelength?
a)
Red
b)
Violet
c)
Yellow
d)
Green
13.
Which rays can be felt as heat?
a)
X-Rays
b)
Infrared Radiation
c)
Ultraviolet Radiation
d)
Microwaves
14.
Electromagnetic waves________________travel through space.
a)
Never
b)
Cannot
c)
Can
d)
Wish they could
15.
The blue section of the wave is measuring _________________.
a)
wavelength
b)
crest
c)
trough
d)
amplitude
16.
Wavelengths on the right side of the Electromagnetic spectrum are ______________.
a)
short
b)
long
c)
average
17.
This wave has the second highest frequency on the spectrum.
a)
microwaves
b)
visible light
c)
x-rays
d)
gamma ray
18.
This type of Electromagnetic wave shows a break in bones.
a)
gamma ray
b)
x-ray
c)
brokenometer
d)
radio wave
19.
What do you have at 10^-6?
Wavelength Not Frequency
Wavelength Not Frequency
a)
Ultra Violet
b)
Visible
c)
Gamma Rays
d)
X-Ray
20.
What do you have at 10^-12?
Wavelength Not Frequency
Wavelength Not Frequency
a)
Ultra Violet
b)
Visible
c)
Gamma Rays
d)
X-Ray
21.
This wave has the second highest frequency on the spectrum.
a)
microwaves
b)
visible light
c)
x-rays
d)
gamma ray
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