Why does a spinning cloud spin faster as it collapses?
Definition
Angular momentum conservation
Term
How does the protostar become hot enough for fusion to occur?
Definition
Frition in the inner accreation disk
Term
How do protoplanets form in a protodisk?
Definition
Accreation of planetestimals
Term
How many Earth's does it take to stretch across Jupiter's diameter?
Definition
11
Term
Which Planet has the greatest radius?
Definition
Saturn
Term
Which planet orbits between Venus and Mars?
Definition
Earth
Term
Rank the Jovian planets in order of distance from the sun: closest first;
Definition
Jupiter, Saturn, Uranus, and Neptune
Term
Rank the Jovian planets in order of size: Largest first:
Definition
Jupiter, Saturn, Uranus, Neptune
Term
Rank the following groups of objects in order of distance from the sun? Closest first:
Definition
Terrestial planets
astroid belt
Jovian planets
Kieper Belt
Term
Rank the terrestrial planets in order of distance from the sun, closest first: Earth, Mercury, Mars, Venus
Definition
Mercury
Venus
Earth
Mars
Term
Rank the terrestrial planets in order of size, largest first: Earth, Mercury, Mars, Venus
Definition
Earth
Venus
Mars
Mercury
Term
Rank the terrestrial planets in order of density, most dense first: Earth, Mercury, Mars, Venus.
Definition
Earth
Mercury
Venus
Mars
Term
What produced the iron in Earth's core
Definition
some nuclear fusion in a massive star's core, mostly supernova
Term
What produced the gold and silver in Earth's crust
Definition
Supernovae
Term
According the solar nebula hypothesis, which of the following is true
Definition
Planetary systems should be common.
Term
What is the reason for the answer to the previous question
Definition
According to the theory, planets form from the gases surrounding a star after it forms
Term
Is there any evidence to support the answers to the previous questions
Definition
Yes; disks of gas and dust and actual planets have been discovered orbiting other stars
Term
What is the evidence that the solar system formed about 4.6 billion years ago
Definition
Term
Where are craters are found
Definition
most solid surfaces in the solar system
Term
What are most craters in the solar system are caused by
Definition
mpacts from space
Term
Why are there so many cratered surfaces in the solar system
Definition
Term
Solid particles sticking together is called which of the following
Definition
Term
Particles growing by addition of material an atom or molecule at a time from a surrounding gas is called which of the following?
Definition
condensation
Term
Which planets are more dense
Definition
Terrestial Planets
Term
Based on the solar nebula theory, what is the reason for the observation in the previous question?
Definition
Term
What is the separation of material in a planet called?
Definition
Differentiation
Term
Why would you expect the process in the previous question to happen?
Definition
Term
What evidence can you cite that planets orbit other stars?
Definition
Term
Potassium-40 decays to calcium-40 with a half-life of 1.3 billion years. Use this diagram to determine the age of a rock in which only 12.5% of its original potassium-40 remains.
Definition
The rock is 3.9 billion years old.
Term
How does the solar nebula theory explain the formation of an asteroid belt between Mars and Jupiter rather than a planet at this location?
Definition
Term
Which of the following is the most likely major heat source that melted early formed planetesimals?
Definition
the decay of short-lived unstable isotopes
Term
How does the solar nebula theory account for the drastic differences between terrestrial and Jovian planets?
