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$100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 $500 Which part of the electromagnetic spectrum can be seen from earth with your own eyes? Visible Light Which part of the electromagnetic spectrum has the longest wavelength? Radio Waves Which part of the electromagnetic spectrum has the shortest wavelength? Gamma Rays All electromagnetic radiation travels at what speed? The speed of light This instrument is used by astronomers to separate light (Electromagnetic Radiation) into its separate parts. The spectroscope What are the three types of spectra? - Continuous spectrum - Emission spectrum - Absorption spectrum This spectrum is a band of unbroken colors The continuous spectrum This spectrum is composed of a black background with unevenly spaced colored lines (Used in labs) The emission spectrum This spectrum is composed of a continuous spectrum background with unevenly spaced black lines (Found in the real world) Absorption spectrum When scientists determine which elements are in stars they compare the… a. absorption spectrum of elements to the emission spectra of a star b. continuous spectrum of elements to the emission spectra of a star c. emission spectrum of elements to the absorption spectra of a star d. emission spectrum of elements to continuous spectra of a star c. emission spectrum of elements to the absorption spectra of a star The beginning of a stars life cycle is a cloud of gas and dust the name of this cloud is a… Nebula A high mass star may explode, this is called A supernova This is the term for a prestar Protostar What kind of star creates a black hole? A massive star In this star elements as heavy as iron may form Massive star When a source of light is moving toward you, the wavelengths of light get closer together. This is called… Blueshift When a source of light is moving away from you, the wavelengths of light get farther apart. This is called… Redshift What happens to sound/light wavelengths you receive when the source if them moves closer? They get closer together, resulting in a higher frequency What happens to sound/light wavelengths you receive when the source of them moves away? They get farther apart, resulting in a lower frequency Is the universe expanding, shrinking, or staying the same size? HOW DO YOU KNOW??? Expanding. Most stars are redshifting or moving apart from each other. The light year is a measurement of… Distance How far is one parsec? 3.26 light years What are the three terms for the brightness of a star? 1. Apparent magnitude 2. Luminosity 3. Absolute Magnitude Put these distances in order from smallest to largest: parsec, km, AU, meter, light year Meter, km, AU, Light Year, Parsec What is the difference between apparent magnitude and absolute magnitude? Apparent magnitude – A star’s brightness measured from Earth (Not standardized) Absolute magnitude – A star’s brightness measured if it were at a distance of 10 parsecs (Uses + and – values) Galaxies are generally made of how many stars? (General range) Millions to billions The Milky Way galaxy is a ______________ shaped galaxy. Spiral Approximately what is the diameter of the Milky Way Galaxy? 100,000 light years Almost all of the stars we see belong to (Where are they located)? The Milky Way Galaxy 95% of the VISIBLE matter in the universe is found where? Stars Arrange yourselves in the correct order of the electromagnetic Spectrum from longest wavelength to shortest wavelength. 1.Radio Waves 2. Microwaves 3. Infrared Waves 4. Visible Light 5. Ultraviolet Light 6. X-Rays 7. Gamma Rays