Test Bank Alien Homeworld Palen Third Edition - Understanding Our Universe 3e Complete Test Bank by Stacy Palen. DOCX document preview.
Mission 8: Alien Homeworld
MULTIPLE CHOICE
1. Wien’s law, which forms the basis of the Blackbody Analyzer, tells us that
a. wavelength is related frequency.
b. blackbodies are essentially black.
c. blackbodies radiate light at all wavelengths and absorb light at all wavelengths.
d. the temperature of a blackbody is inversely related to the peak wavelength of its spectrum.
2. What characteristics of an exoplanet and its orbit can be determined using the transit method and the Light Curve Analyzer?
a. mass d. orbital radius
b. radius e. density
c. orbital period
3. Assume stars A and B have exactly the same luminosity, but Star A is five times more distant than Star B. Which of the following is true?
a. Star B is five times brighter.
b. Star B is 25 times brighter.
c. Star B is 225 times brighter.
d. Star A must have the same temperature as Star B.
e. Star A must have the same radius as Star B.
4. What piece of information needs to be known about the host star for the radius of the planet to be determined from the transit method and the Light Curve Analyzer?
a. mass
b. radius
c. composition
d. distance from observer
e. distance between exoplanet and host star
5. Which of the following make an exoplanet easier to detect with the transit method and the Light Curve Analyzer? Choose all that apply.
a. a large planet d. a planet with short orbital period
b. a star with a small radius e. all of the above
c. a star with a cool surface temperature
6. Which of the following planetary systems would be easiest to detect with the Light Curve Analyzer?
a. A hot, main sequence star orbited by a terrestrial-sized planet
b. A hot, giant star orbited by a terrestrial-sized planet
c. A cool, giant star orbited by a terrestrial-sized planet
d. A cool, main sequence star orbited by terrestrial-sized planet
e. A cool, main sequence star orbited by a Jupiter-sized planet
1. Why does it make sense that the alien civilization’s home world would be orbiting an “evolved” star such as a red giant?
2. What characteristic of the red giant threatens the alien’s homeworld and affects it habitability?
3. As the alien civilization’s home star transitions from a main-sequence star to a cooler, more luminous giant star, what happens to the position of the habitable zone?
4. There are two stars with the same surface temperature: one is a main-sequence star, and the other is a giant star. Both have transiting, Earth-sized planets orbiting them. Which star’s planet is easier to detect? Why?