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Big Bang Theory
| Question | Answer |
|---|---|
| Big Bang Theory | -The universe is finite and expanding -All matter, energy, and space was once squeezed into a very small volume -This resulted in a sudden expansion |
| Visible Light Spectrum | -Part of the Electromagnetic Spectrum -Light emitted from a star or galaxy can be separated into a band of colors called a spectrum |
| Cosmic Microwave Background Radiation (CMB) | -Scientist thought if there was a BB then there must be remnants of energy left out there in the far reaches of the universe -this energy was found in the form of microwaves and is coming at us from every point in the universe -called "relic" radiation |
| Helium | -Makes up 25% of the universe -Element He -Is the lightest element along with Hydrogen |
| Red Shift | -Think of the Doppler Effect when a fire truck passes -The sound waves are compressed in front of the train and make a high frequency sound -After the truck passes the wavelengths spread out making a low frequency sound |
| Spectrograph | -an instrument that separates light by its wavelengths |
| Energy | -the ability to do work, cause change, but can't be created or destroyed |
| Universe | -everything we can touch, feel, sense, measure, or detect -it includes living things, planets, stars, dust clouds, light, time, and galaxies -contains billions of galaxies each containing millions or billions of stars |
| Galaxy | -huge collection of gas, dust, and billions of stars and their solar systems all held together by gravity |
| Astronomy | -the study of everything in the universe beyond Earth's atmosphere |
| Albert Einstein | -General theory of Relativity and Sir Isaac Newton's original theory of Gravity concluded the universe was static (lacking movement) -later proved untrue and Einstein would call it his "biggest blunder" |
| Edwin Hubble | -1929 - Discovered an electromagnetic property called the Red Shift -Explained why galaxies appear to be accelerating away from the other -contrary to Einstein the universe was expanding |
| Electro-magnetic Spectrum | -light emitted from a star or galaxy can be separated into a band of colors called a spectrum -each color has a different wavelength -the longer wavelengths are toward the red end |
| Hydrogen | -Makes up 74% of the universe -Element H -Lightest element along with Helium |
| Fred Hoyle | -English astronomer, Fred Hoyle, coined the phrase Big Bang in 1949. -Most scientists consider it to be the most likely scenario for the birth of the universe. |
| Arno Penzias and Robert Wilson | -In the mid 1960s these 2 scientist were working on a radio when they discovered a mysterious microwave static coming from every direction in the sky -they concluded it must be the after glow of the BB |
| Red Shift (cont.) | -Light emitted from a star or galaxy can be separated into a band of colors called a spectrum -Each color has a different wavelength just like the sound has wavelengths -The longer the wavelengths are toward the red end of the spectrum |
| Red Shift (cont.) | -Light behaves like sound, light has "pitch" - the red end of the spectrum has a lower pitch or frequency than the blue end -Red colors are the lone notes and blue colors are the high notes |
| CMB (cont.) | -In the mid 1960s these 2 scientist were working on a radio when they discovered a mysterious microwave static coming from every direction in the sky -the radiation was very cold which was expected -they concluded it must be the after glow of the BB |
Created by:
ischultz!
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