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8thGr-Sci-WaveUniver

8th Grade Science Test: Waves & Universe

QuestionAnswer
Universe a collection of galaxies
Galaxy a collection of solar systems, gas, ash; dust
Light Year distance light travels in 1 year
Big Bang Theory The expansion of a singularity of energy led to the creation of our universe
Red Shift a drag of red: shows moving away
Blue Shift a drag of blue; shows moving towards
Spiral Galaxy a galaxy with arms coming off a central body
Elliptical Galaxy football shaped galaxy
Irregular Galaxy no defined shape
Subscript small number on lower right
Wavelength distance between crests or troughs
Frequency how often wavelengths repeat in 1 second
Visible light combination of RoyGBiv
Infrared Light light outside the visible spectrum. Heat sensing goggles pick this wave up
Speed distance traveled in time
Velocity Speed in a certain direction
Acceleration change in velocity
Newton's First Law an object at rest stays at rest or an object in motion stays in motion until an outside force is applied
Newton's Second Law Force=Mass x Acceleration
Newton's Third Law For every action there is an equal and opposite reaction
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