The Formation Of The Universe Flashcards
13-15 billion years ago the universe was pure,pent up _____.
Energy
The explosion of this incredibly,small,intensely energetic speck of space _____. As this speck expanded and cooled, matter ____.
Occurred
Developed
Basic matter e.g. Gravitons were created from the energy of the explosion and expanded rapidly outwards ___-____ Billion years ago.
13-15
500 000 years ago-The universe had cooled down to allow basic matter to form into atoms of _____(76%) and ______ (24%). The universe continued to expand rapidly and cool down. These formed into stars and these stars grouped together into _____.
Hydrogen
Helium
Galaxies
Today individual galaxies are linked together into clusters of galaxies e.g. Our milky way is in the ____ cluster. Clusters of galaxies are still expanding outwards into space as a result of the ____ _____. Tell tale micro-wave radiation is found in all space and is thought to be the remnant of the energy of the Big Bang.
Virgo
Big Bang
What are galaxies classified by?
According to their shape into spirals,ellipticals and irregulars.
Light years are the enormous distances between Stars and galaxies in ____.
Space
1 light year is the distance that light travels in 1 year moving at a speed of 300 000km a second. Approximately ____ million Million Kms.
9.5
How far is the sun from us?
8.3 minutes away from us
How far is Proxima Centauri from Earth?
4 light years I
Our galaxy the Milky Way galaxy is 100 000 light years across. Neighboring galaxies include :
The andromeda galaxy
Large and Small Magellenic Cloud Galaxies
How long would we take to take one revolution around the galaxy?
200 million years
Each star is a giant ball of burning ____.
Gas
In the centre of suns,atoms of hydrogen are fusing to form ____ and during this process energy is released. We feel this energy as ____.
Helium
Heat
Suns vary considerably in ____,___,_____.
Size
Colour
Temperature
What is the largest star in our galaxy?
Red Giant
Betelgeuse
Our star is a medium sized,middle aged (4,6 billion years old) star. In many million of years time it will become a red giant when it begins to burn out the hydrogen on its ____ _____. Eventually it will shrink and become a ___ ____ star.
Outer edge
White Dwarf
Bigger stars than our sun might contact further to become an_____ star and eventually, perhaps, a black hole.
Neutron
How did our solar system form?
From a rotating disc of dust and gas. Gravity pulled together the gas and dust.
Where is the greatest matter of material and what did it form?
In middle and formed the sun
What did smaller concentrations form?
Planets
The smaller,solid,planets are closest to the sun and the larger, gassy ones are ______ away. All the planets rotate on their _____ and revolve around the sun.
Further most
Axes
Name the planets in order:
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
