Download Formation of the Solar System Target 1 Notes

The Formation of the Solar System
Target 1 Notes
In the infinite space of our universe, you will find a galaxy called the __________________. This galaxy, is not filled with
chocolate, but billions of solar systems. One of these solar systems contains a rock that we call home,
__________________.
Our solar system formed around __________________ years ago. Scientists believe that a molecular cloud (something
called a stellar nursery), consisting of hydrogen collapsed on itself. The collapsing of the cloud resulted in the collision of
hydrogen atoms, a process known as __________________. These reactions formed a star, which we call our
__________________. Surrounding the sun was a rotating disc of space dust and gas. Over millions of years these
particles of dust and gas began to collide with each other and increase in size and mass, forming the planets and many
other bodies such as comets and asteroids which continue to orbit the sun along a predicted path.
What is the Sun?
As mentioned before, the sun is a __________________. Next time you look into the night sky and see a star twinkling
back at you, hold in your thoughts that this star, is a __________________, and surrounding this sun there could be
planets like ours. The sun is the largest __________________, within the solar system, meaning that in comparison to
all of the other planets and orbiting bodies, it is the largest and contains the most __________________.
The sun is essentially made up of __________________ and __________________. The power that is generated from
the sun comes from __________________ reactions that occur inside the star. Hydrogen atoms collide with other
hydrogen atoms through a process called nuclear fusion, to produce __________________. The energy that is produced
in 1 second, from the sun is the equivalent of more than a trillion __________________ exploding at once. This energy
is seen as __________________, and travels through space in the form of __________________. When it hits our
planet we feel it as __________________.
The Planets
There are __________________ planets and a number of dwarf planets that orbit the sun. You need to know that our
solar system consists of the __________________ rock planets; Mercury, Venus, Earth and Mars, and the
__________________ gaseous planets, Jupiter, Saturn, Uranus, and Neptune. The inner and outer planets are divided
by a bunch of smaller rocks that form the __________________, these rocks range in size from pebbles to huge
boulders.
Satellites
Planet earth along with many others planets within our solar system have __________________. These moons are
called __________________, as they circle the planet along a definite path, called an __________________.