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Formation of the universe By Max Arbour Class:Block 5/6 science

Chapter #1 The big bang created what we now call the universe. Around 14 million years the explosion happened forcing things to expand and continue to expand. Planets and stars are still being discovered and still forming today. Most people know of these two elements, hydrogen and helium. Those two elements were created and formed the big bang. We use these in our everyday lives. If you have a birthday party and your balloons are floating there is a high chance it is helium. Hydrogen is in some chemicals and medicines, if you fertilize your yard there is hydrogen in fertilizer. The three major pieces of evidence for the big bang is. Amount of hydrogen and helium in the universe is consistant, the universe is still expanding, and we can see it through red shift, there is radiation known as "cosmic background radiation" everywhere we look in the universe which is the energy that was released after the big bang.

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Chapter 2 Stars form by the disturbance deep within clouds. Gas and dust begin to collapse under the clouds own gravitational attractions. As the cloud collapses the material at the center begins to heat up, and the core will one day become a star. Nuclear fusion, is a reaction when two or more particles of an element come together to form another element. Nuclear fusion is a atomic reaction that fuels stars. When multiple nuclei come together it adds up and the result is a release of lots of energy at once. In order to create fusion atoms need to have enough energy to come together into one.

Chapter #3 Many of the elements, heavier than iron are created by a supernova. Supernovas are stars that begin to increase brightness and leads to an explosion causing its mass to eject into space. Stars begin with clouds of gas and dust, as the hydrogen molecules come together it starts to spin the gas atoms then begin bumping into each other faster and faster. A stars life cycle is determined by how much mass the star has, if the star has lots of mass it has a shorter life cycle. If the star has a small amount of mass it last a lot longer than big stars also called supernovas.

Chapter #4 One of the most frequently used methods to find the composition of stars in space is using spectroscopy. The scientists look at the wavelength to determine the elements and what kind of star it is and how much mass it has. A spectroscope is a device that reads the object and turns into colors that appear over a ruler in the spectroscope. 

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