1. “The Solar System”
23.1

2. X (you are here)

3. Where are We? Earth = one of 8 planets Earth Revolves around the Sun
Sun + Planets = Solar System

4. Where did Earth Come From?...
Mars

5. Nebular Hypothesis.
Everything in Solar System came from a HUGE, spinning, cloud of dust & gas.
Hypothesis?...
Nebula?...
“Nebula” = Cloud of dust & gas in Space

6. Nebular Hypothesis: Nebula spun really fast Flattened
Dust squishes together in middle
Forms SUN
Other Solids squish together and
form planets

7. 1. Nebula
2. Spins…
3. Sun!
4. Planets!

8. Now What?...

9. “My Very Elegant Mother Just
Bought Us Nine Pizzas”

10. Poor Pluto…

11. Types of Planets Terrestrial Jovian BIG. Big Difference = SIZE
Mercury, Venus, Earth, Mars
Jovian
Jupiter, Saturn, Uranus, Neptune
Rocks & Metals!
Small.
Gas
&
Ice!
BIG.
Big Difference = SIZE

12. Terrestrial Planets Jovian Planets More Dense! Less Dense. Thin Atm.
Thick Atm!
Terrestrial Planets
Jovian Planets
Larger.
More Gravity.
“Pulls” gasses.

13. 11 km/sec
25,000 mph
Escape Velocity
Speed an object must travel to break free of a planet’s gravitational pull.

14. Planets in Order! 4 Terrestrial!

15. Densest?
Largest?
Most gravity?
Thickest Atm?

17. Taboo. Directions: One person is “coach.”
Coach tries to get others in group to say the word.
Coach gives clues, but cannot say the words in the list.
Person with most points wins.
Everyone else gives this person their lunch money.