WWBAT Describe the telescopes and define the Nebular Theory Homework study for the quiz tomorrow Nebular Theory Gravity Definition attractive force bringing items towards itself Bigger objects have more gravity ID: 650073
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Slide1
Question of the Day
What are the four types of telescopes? Why do we care?
WWBAT: Describe the telescopes and define the Nebular Theory
Homework: study for the
quiz tomorrowSlide2
Nebular TheorySlide3
Gravity
Definition: attractive force bringing items towards itself
Bigger objects have more gravity
Earth has more gravity than human, but moon has less than earthSlide4
Inertia
Definition: an object in motion stays in motion; object at rest stays at rest
The more dense something is the faster it spinsSlide5
Rotation vs. Revolving
Rotation: spins on an axis
Revolution: travels around an object
In the case of the Earth it revolves around the sunSlide6
Formation of the Solar System
Nebular Theory: The sun and the planets formed from a rotating disk of dust and gases
Nebula: a cloud of dust and gas that begins rotating due to gravitySlide7
Question of the Day
What is the Nebular Theory?
WWBAT:
D
escribe Nebular Theory and the vocab
Homework: none
Slide8
Steps of Formation
First Step
Cloud not dense, less dense than air and a vacuum
Particles and gas gravity is pulling each other together, making it more dense
Think of dust on a floor, it always seems to slowly clump togetherSlide9
Steps of Formation
Second Step
Cloud is spinning slightly
Becoming more dense so spins faster
Spinning begins to create dense core in the middle of cloudSlide10
Steps of Formation
Third Step-Planetesimals
As the nebula spins, small pieces of matter collide and stick together forming planetesimals
Oddly shaped
Planetesimals grow larger, gain more gravity, and become rounded, making them planets
Some planetesimals do not stick together to make planets, instead remain as asteroidsSlide11
Nebula
Nebula
starts to spin
.
c. Most of the mass goes to the middle for the sun.
Planetesimals
form
.
e.Planets
form in orbits around the sun.Slide12
Our Solar System
99.85% of the mass of the Solar System is in the sun
Sun: 1.9882x10^30 kg
Earth: 5.9742x10^24 kg
**REMEMBER: every power is ten times biggerSlide13
Can you name the planets?