Astronomy Exam 2 Study Guide
Chapter 7: Our Planetary System
What does the solar system look like?
o From the outskirts of our solar system, the planets would be only pinpoints
of light, and even the Sun would be just a small bright dot in the sky.
What is an atmosphere?
o An atmosphere is a layer of gas that surrounds a world.
o 2/3s of the air in Earths atmosphere lies within 10 kilometers of Earths
Create pressure that determines whether
Chapter 9 Learning Goals
9.3 Geology of the Moon and Mercury
What geological processes shaped our Moon?
o Volcanism and Tectonics in the Lunar Maria: Since the Moon cooled so
quickly in its life, it took the lava floods hundreds of millions of years
9.1 Connecting Planetary Interiors and Surfaces
What are terrestrial planets like on the inside?
o Core: The highest-density material, consisting primarily of metals such as
nickel and iron, resides in the central core.
o Mantle: Rocky material of modera
Astronomy: chapter 8
8.1 The Search for Origins
What properties of our solar system must a formation theory explain?
The patterns of motion we discussed in Chapter 7
Why planets fall into two major categories: small, rocky terrestrial planets near
Astronomy: chapter 8 notes (continued)
8.3 The Formation of Planets
Why are there two major types of planets?
Hydrogen compounds could condense into ices only beyond the frost line, which
lies between the present-day orbits of Mars and Jupiter.