Chap 8 Quiz
As the solar nebula cooled, which compounds were the first to condense from a gas to a solid?
Metals
The _________ for discovering exoplanets looks for tiny dips in light as a planet passes in front of its star.
Transit Method
Almost the entirety of Jupiter's size is made up of ...
gas
The planets closest to the Sun are known as the
terrestrial planets
If the peak wavelength of a star at rest is 1375 nm, then what peak wavelength is observed when the star is traveling 975,000 m/s away from the Earth.
1379.47
The gas in the solar nebula began at a temperature of about ....
2000 K
If the peak wavelength of a star at rest is 615 nm, then what peak wavelength is observed when the star is traveling 2,500,000 m/s toward the Earth.
609.875
A gas particle will escape a planet's atmosphere if it moves faster than the ...
INCORRECT- "capture speed"
How many asteroids (that we know of) are on a potential collision course with Earth?
INCORRECT- 25 - 50
If a star is traveling toward you, its observed spectrum will be ....
INCORRECT- Red-shifted
If we could capture the spectrum of an exoplanet, we may find evidence for life on that planet in the form of
biosignatures
A planet will keep a large atmosphere if it _________ or __________.
is cold .... has a ton of gravity
The moon Titan is special because....
its surface is wet
"More money is spent on making movies about ____________ than on actually finding them."
killer asteroids
Jupiter weighs roughly ....
twice as much as all the other planets combined
Which of the following parts of the formal definition of a planet does Pluto fail to meet?
INCORRECT-It is found in a roughly round shape
Why do some astronomers object to the new definition of a planet that was adopted in 2006?
INCORRECT-It means that we now technically have over 100 planets.
What two factors influence whether gas particles stay or leave a planet's atmosphere
INCORRECT-gravity and particle size
The discovery of _________ prompted astronomers to reconsider whether Pluto should really be called a planet.
INCORRECT-the Oort Cloud
