Date post: | 21-Dec-2015 |
Category: |
Documents |
Upload: | brook-woods |
View: | 216 times |
Download: | 0 times |
ACTIVATING STRATEGY:
On your notes write out your address…
Now what country…
What continent…
What planet…
What galaxy?
After today’s lesson, you should be able to
answer all of these questions and more!
HOW IS OUR SOLAR SYSTEM POSITIONED IN THE MILKY WAY GALAXY
AND THE UNIVERSE?S6E1b. Describe the position of the solar system in the
Milky Way Galaxy and the universe.
THE BIG BANG THEORY
The most commonly accepted theory today of the formation of the universe is
the Big Bang Theory.
The theory states that the universe originated sometime between 10 billion
and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature.
THE UNIVERSE AFTER ITS BIG BANG…
As millions of years passed, the dense areas of the universe
pulled in material because they had more gravity. Finally, about 100 million years after the Big Bang, the gas became hot and
dense enough for the first stars to form. Large clusters of stars soon became the first galaxies.
Scientists believe that Solar Systems formed in similar ways.
Giant clouds of dust and gas began to collapse under the
weight of its own gravity. As it did so, the matter contained within it began to move in a
giant circle, much like the water in a drain moves around the
center of the drain in a circle.
At the center of this spinning cloud, a small star began to
form. This star grew larger and larger as it collected more and more of the dust and gas that
collapsed into it.
Further away from the center of this mass where the star was
forming, there were smaller clumps of dust and gas that were also
collapsing.
The star in the center eventually ignited forming our Sun, while the
smaller clumps became the planets, minor planets, moons, comets, and
asteroids.
In short, after the Big Bang, dense clouds of gas and dust from the
“bang” either collapsed or stuck together to form the parts of the
universe we know today.
The Universe contains billions of galaxies, each containing millions
or billions of stars.
Therefore, the galaxy in which our solar system and essentially all of
us live, is just one of billions.
Distributed Summarizing: Turn to a seat partner and come up
with a comparison of our galaxy within the universe.
THE MILKY WAY GALAXY Contains single
star systems, double stars, and dust and gas
It is a spiral galaxy because it has spiral arms that wind outward from the center
THE MILKY WAY GALAXY Why is our galaxy called the
Milky Way? Thousands of years ago people
thought the stars appeared as a patchy band of light like a flowing river of milk, thus the name Milky Way.
Also, the word galaxy comes from the Greek word gala, meaning milk.
OUR SOLAR
SYSTEMOur solar system is a single star system located on an outer rim
(arm) of the Milky Way Galaxy.
STUDY JAMS: THE SOLAR SYSTEM
EXAMINE THE MILKY WAY GALAXY AT DIFFERENT SCALES
SCALE OF THE UNIVERSE ANIMATION
DIGITAL UNIVERSE
DISTRIBUTED SUMMARIZING:
The map to the right shows Troup County.
The lines and numbers represent
interstates and major roads running through Troup
County.
Imagine that the circle in the middle of the map is the center
of the Milky Way Galaxy. Draw an
asterisk (*) showing where the Solar System might be
located on our Troup County map.