Astronomy Chapter 16 Review – Flashcards
Unlock all answers in this set
Unlock answersquestion
What is the Catastrophic hypothesis?
answer
Star passing closely tore material and made planets.
question
What is the evolutionary hypothesis?
answer
Rings of material separate from the spinning cloud forming planets?
question
What is the Jovian problem?
answer
super common and forms too quickly
question
Which planets do not have crater? Why?
answer
Jovian, they are made of gas.
question
Which planets are more dense?
answer
Jovian
question
Which planets have a larger diameter?
answer
Jovian
question
Which planets have orbits that are inclined by more than 3.4 degrees?
answer
Mercury and Pluto
question
Which planets do not rotate counter-clockwise?
answer
venus uranus pluto
question
In what direction do all of the planets revolve around the sun?
answer
counter-clockwise
question
What is a meteor?
answer
Small dust grains throughout the solar system.
question
What is an extrasolar planet?
answer
Planets orbiting around other stars
question
How can astronomers detect extrasolar planets?
answer
Doppler shifts and wobble look in front of star.
question
How is the presence of space debris accounted for by solar system models?
answer
Left-over material and collision debris.
question
What is the most important effect of clearing the solar nebula with gas and dust?
answer
solar wind and radiation
question
How do we know that the solar system is about 4.6 billion years old?
answer
radioactive dating
question
The jovian planets have a mass that is more than how many earth's masses?
answer
15
question
What types of planets are located beyond the asteroid belt, have extremely large masses and have very low densities?
answer
Jovian
question
What process is responsible for the creation of a secondary atmosphere?
answer
outgassing
question
As planets formed, what types of grains formed near the sun first? Farther from the sun, grains of what formed net? What process caused these to form?
answer
planetessimals, protoplanets, condensation and accretion
question
Protoplanets form from grains of solid matter called what?
answer
planetessimals
question
How did protoplanets form
answer
condensation and accretion
question
For terrestrial planets, where is the most dense material locate? Where is the least dense material located?
answer
Core, Crust
question
What is differentiation?
answer
The separation of planetary material according to density
question
What is condensation?
answer
The growth of a particle from surrounding gas atom by atom
question
What is outgassing?
answer
the release of gasses from a planet's interrior
question
What is accretion?
answer
the sticking together of solid particles to produce a larger particle
