Astro 7n Unit 1 & 2 UPDATED ACTUAL
Exam Questions and CORRECT Answers
From Earth, in which constellation might you find the planet Saturn? - CORRECT
ANSWER - Taurus
Why don't we see the constellation Orion at night all throughout the year - CORRECT
ANSWER - As the Earth orbits the Sun, its nighttime side point to different constellations
at different points along its orbit
When is the best time for you to be able to see the constellation that is your sign of the Zodiac? -
CORRECT ANSWER - At midnight six months after your birthday
Constellations close to the North pole of Earth: - CORRECT ANSWER - Move in a circle
around the North star, Polaris, over the course of a single night.
There are a total of 88 constellations. Roughly how many of these can be seen at any given time
from a single location on a clear night? - CORRECT ANSWER - 44
What is the relationship between wavelength and frequency? - CORRECT ANSWER - If
the frequency increases the wavelength decreases
Compare the frequency of an X-ray with that of visible light. - CORRECT ANSWER -
The X-ray has a larger frequency than visible light
Compare the frequency and wavelength of gamma ray with visible light. - CORRECT
ANSWER - Gamma ray frequency is higher and it's wavelength is lower
If the frequency of radiation is twice as large then its wavelength is... - CORRECT
ANSWER - half as large
, The spectrum of an oxygen lamp looks different than the spectrum of a sodium lamp because: -
CORRECT ANSWER - each atom has a unique set of electron orbits
Dark lines in an absorption spectrum represent: - CORRECT ANSWER - particular
energies of light coming from a distant object that are absorbed by material in between
Which of the following is FALSE? - CORRECT ANSWER - The energy of a photon
increases in proportion to the wavelength of the radiation.
Which of the following is true? - CORRECT ANSWER - An absorption spectrum appears
as continuous spectrum interrupted by a series dark lines.
The electrons in a cloud of hydrogen gas are making the transition from excited states to the
ground state. What does the spectrum of this cloud of hydrogen gas look like? - CORRECT
ANSWER - It will consist of a few bright emission lines at specific wavelengths.
In what ways does a 30 meter telescope outperform a 10 meter telescope? - CORRECT
ANSWER - Its images are 9 times brighter than a 10 meter
Even the largest ground based telescopes have resolution restrictions imposed by: - CORRECT
ANSWER - Atmospheric blurring of images
When you magnify an object with a telescope, what else happens to your view of the sky? -
CORRECT ANSWER - Your field of view gets smaller so you can only see a small area
of the sky
How long would one need to observe a star on a 10 meter telescope to collect the same amount
of light as one collects in one hour on a 5 meter telescope? - CORRECT ANSWER - 15
minutes
What was Kepler's First Law? - CORRECT ANSWER - Planets revolve around the sun in
elliptical orbits with the Sun at one focus of the ellipse.
Exam Questions and CORRECT Answers
From Earth, in which constellation might you find the planet Saturn? - CORRECT
ANSWER - Taurus
Why don't we see the constellation Orion at night all throughout the year - CORRECT
ANSWER - As the Earth orbits the Sun, its nighttime side point to different constellations
at different points along its orbit
When is the best time for you to be able to see the constellation that is your sign of the Zodiac? -
CORRECT ANSWER - At midnight six months after your birthday
Constellations close to the North pole of Earth: - CORRECT ANSWER - Move in a circle
around the North star, Polaris, over the course of a single night.
There are a total of 88 constellations. Roughly how many of these can be seen at any given time
from a single location on a clear night? - CORRECT ANSWER - 44
What is the relationship between wavelength and frequency? - CORRECT ANSWER - If
the frequency increases the wavelength decreases
Compare the frequency of an X-ray with that of visible light. - CORRECT ANSWER -
The X-ray has a larger frequency than visible light
Compare the frequency and wavelength of gamma ray with visible light. - CORRECT
ANSWER - Gamma ray frequency is higher and it's wavelength is lower
If the frequency of radiation is twice as large then its wavelength is... - CORRECT
ANSWER - half as large
, The spectrum of an oxygen lamp looks different than the spectrum of a sodium lamp because: -
CORRECT ANSWER - each atom has a unique set of electron orbits
Dark lines in an absorption spectrum represent: - CORRECT ANSWER - particular
energies of light coming from a distant object that are absorbed by material in between
Which of the following is FALSE? - CORRECT ANSWER - The energy of a photon
increases in proportion to the wavelength of the radiation.
Which of the following is true? - CORRECT ANSWER - An absorption spectrum appears
as continuous spectrum interrupted by a series dark lines.
The electrons in a cloud of hydrogen gas are making the transition from excited states to the
ground state. What does the spectrum of this cloud of hydrogen gas look like? - CORRECT
ANSWER - It will consist of a few bright emission lines at specific wavelengths.
In what ways does a 30 meter telescope outperform a 10 meter telescope? - CORRECT
ANSWER - Its images are 9 times brighter than a 10 meter
Even the largest ground based telescopes have resolution restrictions imposed by: - CORRECT
ANSWER - Atmospheric blurring of images
When you magnify an object with a telescope, what else happens to your view of the sky? -
CORRECT ANSWER - Your field of view gets smaller so you can only see a small area
of the sky
How long would one need to observe a star on a 10 meter telescope to collect the same amount
of light as one collects in one hour on a 5 meter telescope? - CORRECT ANSWER - 15
minutes
What was Kepler's First Law? - CORRECT ANSWER - Planets revolve around the sun in
elliptical orbits with the Sun at one focus of the ellipse.
