opening activity pick a seat lets stay in that seat for a couple of weeks. pre-assessment what do...
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Which picture shows the higher pitch? Which picture shows the higher frequency? A B Draw and label in your notes. Label high and low frequency, high and low pitchTRANSCRIPT
Opening ActivityPick a seat… let’s stay in that seat for a couple of
weeks.
Pre-AssessmentWhat do you know about the Big Bang Theory?
Aug 25
Today’s DateOpening Activity Work
Today’s Picture(s)
Exit Slip
Today’s Note(s)
2
3
4
5
1
• Which picture shows the higher pitch?• Which picture shows the higher frequency?
A B
Draw and label in your notes. Label high and low frequency, high and low pitch
Sounds of NASCAR
Engine Running, Car Not Moving
Sounds of NASCAR
Engine Running, Car Moving Fast to Left
OverviewEnergy Moves in Waves
• Wavelength = length of a wave
• Frequency = wavelengths per second– The number of waves per second to pass a given
point.
Doppler Effect
• Waves have a higher frequency as their source is moving toward you.
AND…
• A lower frequency as its source is moving away from you.
Light Travels in Waves Too
Lower frequency higher frequencyWhat happens if a yellow light moves TOWARD you?What happens if a yellow light moves AWAY from you?
Main Idea of entire lesson here!
• Red Shift: if a light source is moving away from you, the color of the light shifts toward the red end of the spectrum.
Edwin Hubble
• Noticed almost all of the stars in the sky experienced red shift.
• This means… most of the stars in space
are moving away from us.
Exit Slip
• If stars are all moving away from Earth, what does this mean about the universe?