NOTE:  Assess your work on the basis of 4 points total - 2 points for each question.

1. List some features of our solar system that any theory of solar system formation should be able to explain. This is a fairly long list (at least a dozen items), so don’t quit too early.

a. All planets orbit counterclockwise (as viewed from solar-system North) in one plane
b. Most planets spin counterclockwise on their axis (North view)
c. Most of the mass (99%) is in the Sun, which also spins counterclockwise
d. Inner planets are rocky, outer planets are gaseous (except Pluto)
e. Some inner planets have atmospheres, some don't
f. Some inner planets and the asteroids show signs of intense impact cratering
g. All inner planets show signs of volcanism, but to varying degree.
h. The density of the outer planets is markedly lower than that of the inner planets.
I. The outer planets have lots of moons, while moons are rare around the inner planets.
m. The outer planets have rings, the inner planets don't.
n. The outer planets have intense magnetic fields, but only Earth has a significant field among the inner planets.
o. The spacing of the outer planets is much greater than the spacing of the inner planets.
p. Radioactive age dating of objects we have tested all indicate an age of several billion years.
q. Comets appear frequently in the planetary part of the solar system, and exhibit highly elliptical orbits.
r. Asteroids orbit between Mars and Jupiter in a counterclockwise fashion, with "Kirkwood gaps" in the distribution of orbits.
s. The composition of the Jovian planets resembles that of the Sun.
t.  Small objects orbit in a "belt" outside of Pluto's orbit in a counter-clockwise fashion.
u. The long period comets appear to originate from a vast reservoir of comets extending far outside the "belt" mentioned in item "t".

2. Summarize the evidence that our solar system is 4.6 billions years old. Include observational as well as theoretical evidence.

The sole observational evidence is that of radioactive age dating various kinds of objects in the solar system. This includes the following types of samples:
a. Older rocks on Earth - up to a little over 4 billion years of age
b. Samples from the Moon obtained from manned exploration are more than 4 billion years old
c. Samples from Mars that landed on Earth - a few billion years old
d. Meteorites that landed on Earth (which are in turn asteroid fragments) - these are generally the oldest (about 4.6 billion years). For physical basis, consider the U-238 age dating method.  The half life of U-238 is about 4.5 billion years, and the product of that decay is Pb-206 (lead).  In meteoritic samples from the asteroid belt, the amount of U-238 is about the same as the amount of Pb-206, implying an age equal to the half-life of U-238.  An implicit assumption is that the sample contained no Pb-206 initially, and another assumption is that the sample did not melt since formation (melting re-sets the clock because lead and uranium have very different melting temperature).
Theoretically, the solar nebula theory for formation of the solar system predicts that planets should form from left-over stuff (in the dusty disk) about the same time as the central star is in its late formation stages, just prior to entry onto the H-R diagram main sequence. Thus, everything we currently see (Sun, planets, comets, asteroids) should have a common age. Finally, the expected lifetime of our Sun is 10 billion years, so nothing in the solar system should have an age greater than that value (which is true based on measurements to date).