This week's questions help us understand how the planets in our solar system turned out like they did.

new reading is 7(5,6)

1. What are some other major differences -- besides size, distance from the sun, and composition (because we did these in class) -- (like at least 4?) between the terrestrial and Jovian planets?
 

2. The name for our best theory that explains the origin of planets in the solar system is the condensation-accretion theory. 

a) Explain in simple language what each of these two words (condensation & accretion) mean.

b) Which had to happen first?

c) Why?  give some common everyday-experience evidence that gas-gas collisions are not sticky and
that solid-solid collisions are sticky (1 piece of evidence for each)

3. There are only 4 kinds of materials in our solar system (pure metal, such as Fe/Ni; silicates (Si and O with perhaps some metal, such as Al, Mg, or Ca); hydrides of C,N, & O: aka  methane, ammonia, and water;  hydrogen/helium]

a) why are the terrestrial planets made only of the first two categories, Fe/Ni and silicates (and not the other stuff)?

b) why are the Jovians made predominantly of the latter two categories in the above group?

I did my own work on this JIT.

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