In Quest of the Universe, 5e: Explorations

Title Text: In Quest of the Universe, Fourth Edition

Home

Explorations

NetQuestions

Study Quizzes

Flashcards

Online Glossary

Chapter Outlines

Astronomy Picture of the Day

Study Quizzes

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: Compared to X-rays, radio waves have _____ frequency and _____ energy.
	A: higher, higher
	B: lower, lower
	C: higher, lower
	D: lower, higher
	E: (This is misleading. All parts of the electromagnetic spectrum have the same energy and frequency. They only differ in wavelength.)

2: A photon interacts with an atom and gets absorbed by it. As a result,
	A: the atom will likely emit a photon at a later time.
	B: the atom may lose an electron.
	C: an electron in the atom moves to a higher energy state.
	D: an electron in the atom moves farther from the atom's nucleus.
	E: (All of the above.)

3: You are observing three stars. The wavelength at which star X emits most of its energy is 650 nm. The wavelength at which star Y emits most of its energy is 400 nm. Star Z has a surface temperature of about 5800 K. In order of increasing temperature for the three stars, which of the following sequences is correct?
	A: X, Y, Z
	B: X, Z, Y
	C: Y, X, Z
	D: Y, Z, X
	E: Z, X, Y

4: You are observing a star of temperature 10,000 K. Between you and the star is a cloud of hydrogen at 20,000 K moving away from you and toward the star. The observed spectrum includes
	A: a continuous spectrum and redshifted hydrogen emission lines.
	B: a continuous spectrum and redshifted hydrogen absorption lines.
	C: a continuous spectrum and blueshifted hydrogen emission lines.
	D: a continuous spectrum and blueshifted hydrogen absorption lines.
	E: a continuous spectrum with all the lines at their expected places as seen in a laboratory.

5: You are observing an object whose spectrum includes a line at 490 nm. This line is observed at 500 nm in the laboratory. Therefore you conclude that this object
	A: is moving away from us at a speed of 1/50 the speed of light.
	B: is moving away from us at a speed of 1/10 the speed of light.
	C: is moving toward us at a speed of 1/50 the speed of light.
	D: is moving toward us at a speed of 1/500 the speed of light.
	E: is moving toward us at a speed of 1/10 the speed of light.

6: The surface temperature of star X is 10,000 K, while that of star Y is 20,000 K. Both stars have the same radius. Which of the following is a correct description of the amount of energy per second emitted by the two stars?
	A: Star Y emits more energy than star X by a factor of 2.
	B: Star Y emits more energy than star X by a factor of 4.
	C: Star Y emits more energy than star X by a factor of 8.
	D: Star Y emits more energy than star X by a factor of 16.
	E: Star X emits more energy than star Y by a factor of 16.

7: The temperature of object X is 459.4 degrees Fahrenheit, while that of object Y is 0 degrees Fahrenheit. Both objects can be considered as blackbodies, and they are identical in every other aspect. Which of the following is a correct description of the amount of energy per second emitted by the two objects?
	A: Object Y emits no energy.
	B: Object X emits 459.4 times more energy than object Y.
	C: Object X emits more than 495.4 times the energy emitted by object Y.
	D: Object X emits 16 times more energy than object Y.
	E: (None of the above.)

8: NASA engineers are trying to communicate with a rover on the Martian surface using radio signals. Approximately how long does it take for the signal to reach the rover if Mars is 0.8 AU away from the Earth?
	A: 7 minutes
	B: 0.8 minutes
	C: 0.8 seconds
	D: 7 seconds
	E: 0.8 hours

9: Venus is about 0.7 AU away from the Sun. A unit area at the top of Venus' atmosphere receives about ______ times more sunlight than a unit area at the top of Earth's atmosphere.
	A: 1.4
	B: 2
	C: 0.7
	D: 4
	E: 16

10: Which of the following best demonstrates the wave nature of light?
	A: reflection
	B: refraction
	C: diffraction and the photoelectric effect
	D: diffraction and interference
	E: The fact that it needs a medium to move through.

Optional: Enter your name and your instructor's E-mail address to have your results E-mailed to him or her.
Your Name:
Instructor's E-mail Address:
Your E-mail Address:

© Copyright 2009 Jones and Bartlett Publishers
Contact Technical Support