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Astronomy

study for test

TermDefinition
Life of stars Stars have different life cycles based on mass
2 kinds of stars Average and Massive
Nuclear Fission Combine hydrogen to make helium. Releases energy and reaches earth as radiation
Isotopes Different types of the same element
Big Bang theory Color of light Existence of Microwaves Evidence from telescopes
How did the big bang theory happen World expanding - Must have been smaller Color of light changes Wavelengths stretch farther as light travels
Doppler effect The change in a frequency of a wave related to the observer
Microwave Represents the afterglow of the Big Bang
Supernova An explosion of a red Supergiant
Origin of the universe BBT suggests the universe began 13.8 billion years ago
After big bang Universe expanded rapidly
Newtons 1st law An object will maintain a constant velocity unless acted upon by a net force.
Gravity A force of attraction among all objects
Newtons 2nd law F=ma
Newtons 3rd law For every action there is an equal and opposite reaction.
Kepler's 1st law Planets orbit in ellipses ( ovals ) with the sun at one focus
Kepler 's 2nd law Planets sweep equal areas in equal time.
Kepler's 3rd law Planets that are closer to the sun have a shorter orbit that planets that are farther.
Created by: Books 1224
 

 



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