Transcript The Solar System

“The Solar System”
23.1
X (you are here)
Where are We?
• Earth = one of 8 planets
• Earth Revolves around the Sun
• Sun + Planets = Solar System
Where did Earth Come From?...
Nebular Hypothesis.
Everything in Solar System came from a
HUGE, spinning, cloud of dust & gas.
Hypothesis?...
Nebula?...
“Nebula” = Cloud of dust & gas in Space
Nebular Hypothesis:
1.
2.
3.
4.
5.
Nebula spun really fast
Flattened
Dust squishes together in middle
Forms SUN
Other Solids squish together and
form planets
1. Nebula
2. Spins…
3. Sun!
4. Planets!
Now What?...
“My Very Elegant Mother Just
Bought Us Nine Pizzas”
Poor Pluto…
Types of Planets
Rocks
&
Metals!
Gas
&
Ice!
1. Terrestrial
– Mercury, Venus, Earth,
Mars
Small.
2. Jovian
– Jupiter, Saturn, Uranus,
Neptune
Big Difference = SIZE
BIG.
Thin Atm.
More Dense!
Terrestrial Planets
Jovian Planets
Less Dense.
Larger.
More Gravity.
“Pulls” gasses.
Thick Atm!
11 km/sec
25,000 mph
Escape Velocity
Speed an object must travel to break free
of a planet’s gravitational pull.
Planets in Order!
4 Terrestrial!
Densest?
Largest?
Most gravity?
Thickest Atm?
Taboo.
Directions:
1. One person is “coach.”
2. Coach tries to get others in group to say the
word.
3. Coach gives clues, but cannot say the words
in the list.
4. Person with most points wins.
5. Everyone else gives this person their lunch
money.