Download Solar System Formation

Solar System Formation
Quick Write
In this chapter, you will learn about
the formation of the Solar System.
Write down these questions and
answer them in complete sentences.
1. What do all planets and stars begin
as?
2. Describe condensation when planets
form.
1. How does SS
formation begin?
Gas and dust or
interstellar cloud of
dust and gas or a
nebula (all same thing).
2. Most abundant gas in
the universe?
Hydrogen (H) 1st, and
Helium (He) 2nd.
3. Do nebulas give off
light?
No, but stars near them
or behind them cause
them to glow.
4. Diagram of
condensation.
5. How long does gravity
take to condense a nebula?
Starts slowly, speeds up
as cloud becomes denser.
Check for Understanding
All stars and planets begin as what?
Sketch a nebula beginning to
condense into a planetesimal.
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6. What two things
come from nebulas?
Stars and planets.
7. Planet formation?
Starts with condensation
of a cloud of dust and gas
until a dense object forms
(planetesimal).
8. Diagram of solar system so far…
9. Then what?
Planetesimals attract more dust and gas, and
eventually become planets.
Check for Understanding
Beginning with a nebula of dust and gas,
the process of ______ will eventually
cause planets and stars to form.
Gravity or Condensation or Both
Objects that form and eventually
turn into planets are called _______.
Nebular Clouds or Planetesimals
10. Why few asteroid
impacts now?
Little dust and gas left after
Earth, Moon and Sun have
attracted it over 4.6 billion yrs.
11. Asteroids?
Concentrated between
Mars and Jupiter in the
asteroid belt.
12. Comets?
Made of mostly ice.
13. Pieces of asteroids
are called what?
•Approaching Earth =
meteoroid.
•Burning up in Earth’s
atmosphere = meteor.
•Impacts the surface
of Earth = meteorite.
Check for Understanding
Why are asteroid impacts on Earth
and the Moon rare?
Match the following:
1. Meteor
a. burning up in Earth’s atmosphere
2. Meteoroid b. impacts surface of Earth
3. Meteorite c. approaching Earth
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