Download geocentric and heliocentric

Lesson 1 & 2
Big Bang
Our Position in the Solar
System
Heliocentric & Geocentric
Models
Lesson 1: Heliocentric &
Geocentric Models
Standard S6E1.a
Relate the Nature of Science to the
progression of basic historical scientific
theories (geocentric and heliocentric) as
they describe our solar system and the
Big Bang as it describes the formation of
the universe.
Lesson 2: Our Position in the
Solar System
Standard S6E1.b
Describe the position of the solar system
in the Milky Way galaxy and the universe.
What created all of this?
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What created all of this?
Big Bang
Theory that the universe was
produced by a great
explosion.
Inside our universe…..
After Big Bang, the universe was created.
There were gases called helium and hydrogen
that were left over.
200 million years later, these gases came
together to form the first stars
Gravity drew these stars together into families of
stars called GALAXIES
We live in one of these galaxies.
There are galaxies….
Galaxy
Galaxy
Galaxy
Galaxy
Galaxy
Clumps of material began to form in the center of the spinning
matter. Gravity drew more and more material in ward. As the
clump grew larger, so did the amount of pressure, which created
tremendous amounts of heat. This formed our sun.
During the next 10-100 million years, grains of dust around the
sun collided into one another. Many stuck together and eventually
formed the 9 planets, moons, asteroids, comets, and space rocks.
Clumps of material began to form in the center of the spinning
matter. Gravity drew more and more material in ward. As the
clump grew larger, so did the amount of pressure, which created
tremendous amounts of heat. This formed our sun.
During the next 10-100 million years, grains of dust around the
sun collided into one another. Many stuck together and eventually
formed the 9 planets, moons, asteroids, comets, and space rocks.
Fill in Chart about the
formation
Galaxy
of the Solar System.
Galaxy
Milky Way Galaxy
There are 300 billion stars in this galaxy.
Our sun is one of them.
Galaxy
This is the Milky Way Galaxy.
Our solar system is inside the Milky
Way galaxy.
Galaxy
The Milky Way Galaxy has a spiral
shape. It is shaped like a giant flattened
disk with a bulge in the middle (think of
a fried egg sunny-side up).
Galaxy
Where are we?
Our sun and solar system is on one of
the outer arms of the Milky Way galaxy.
Galaxy
How BIG is our galaxy?
100,000 light years in diameter
What is a lightyear? : distance light
travels in a year.
In km… 1 ly=9.5 trillion, billion km.
Astronomical unit: distance between the
sun and the Earth. (150,000,000 km)
(150,000,000 km)=93,205,680mi
Early Ideas about our Solar
System
Early Ideas about our Solar
System
Heliocentric Model
Heliocentric Model
The idea that the objects in
the solar system revolve
around the Sun.
“Helios” in Greek = sun
(Made sense, sun rose the east and set in
the west).
Geocentric Model
The idea that the objects in
the solar system revolve
around Earth.
“Geo” in Greek= Earth
Geocentric Model
Geocentric Model
LISTEN… fill in the blanks on your
notes. This is your WORD BANK
1. Geocentric
2. Heliocentric
3. Sun revolves around Earth
4. Galileo
5. Copernicus
For centuries people believed
that ___________
revolved around
___________.
This was the ____________
Model.
__________was the first
scientist to think that the
sun was the center of the
solar system.
_________ tested this theory,
observing Jupiter and
Venus.
_________ concluded that
the sun was the center of
the solar system.
This is called the _________
model.
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