Download Origin and Formation of the Universe – PowerPoint notes

Formation of the Universe – PowerPoint notes
Integrated Science 2
Name:
Period:
Formation of Galaxies
1. Galaxies begin as a _____________________________ in space
2. The cloud __________________ under the force of it’s own ____________________,
forming galaxies of a variety of shapes.
3. Our galaxy, the ____________________________ is a spiral galaxy, consisting of a
_____________________ surrounded by arms that rotate in a _______________________.
4. Solar systems similar to our move around in this galaxy in a ________________________.
Formation of Solar Systems
 Within each galaxy are many ______________________ (plural of nebula).

A nebula is ____________________________________________________ from which stars
and eventually solar systems are formed.

Nebula can be _________________________________ depending on the chemical makeup of
the __________.
How a Nebula Becomes a Solar System – the ____________________________ Hypothesis
1. A rotating cloud of gas _____________________________________.
2. to form a thin disk around the forming ________________ at the center
3. Planets grow from ______________________________ in the disk and are left behind when
the disk clears.
Formation of OUR solar system
 Our sun was the _____________________ of that cloud of dust and gas.

As the planets formed, the _____________________ ones were pulled closest to the
___________. They are called ___________________________ )Mercury, Venus, Earth, and
Mars)

The ___________________ planets moved toward the _________________ portion of the
solar system. They are called ______________________ or Gas Giants. (Jupiter, Saturn,
Uranus, and Neptune)

Pluto is now thought to be a ______________________, most likely a captured comet who
was draw in the by gravity of the sun and placed in an orbit around it (similar to
___________________)
Planetary Development
Terrestrial planets go through the same 4 stages of development
1. DIFFERENTIATION – heavier materials move to the ________________ of the
planet, lighter materials move to the _________________ portion while it is still
molten ___________________.
2. BOMBARDMENT – planets receive surface features due to _______________ from
space debris (there was much more debris in the early universe!)
3. FLOODING – planets were covered with ______________________________ or
________________, filling in lower areas.
4. SURFACE EVOLUTION – planets continue to change their look from
___________________, ___________________, or ________________________.
Jovian planets (gas giants) all when through __________________________, but we are unsure
about development after that. We DO know that they are constantly influenced by
__________________ that move through their thick __________________________.
Formation of Moons and Rings
Planets have moons for 2 different reasons

A large object in space ________________________, throwing out debris that collected
into a __________________ (Ex: Earth’s moon)

_____________________ have been captured by the planet when they came too close,
getting trapped by the ____________________________ of the planet (Ex: The moons of
Mars)

All planets have moons except __________________ and ________________.
Some planets also have rings

Rings are either ____________________________________________ but trapped in its
gravitational field OR they are rings of debris from ________________________
________________________.

Only the ___________________________ have rings.