Download - Make a Name Tag
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Make a Name Tag• Make a name tag (folded hotdog
style)• Personalize your name tag with
symbols and pictures that represent you
• I will keep these on my cart every day
• They will be used to form groups/seating charts, to call on people, etc.
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Section 2.1(Assigned on Monday)
Ancient Astronomy Development• Major driving force was
practicality• Navigation• Seasons• Timekeeping
• Ex. Stonehenge, Big Horn Medicine Wheel, Caracol Temple, Sundaggar, etc.
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Stonehenge3,000BC to 2,000BC
https://www.youtube.com/watch?v=-6oxmxPKoSE
https://www.youtube.com/watch?v=_n2QNHN72wA
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Unit 2.2(Assigned Tuesday)
Cosmology- The science of the origin and development of the universe.
Greeks• The universe did not go farther than the
Solar System. – Earth, Sun, Moon• The model was literal to what we
observe on Earth. • We do not feel the earth move, Sun
looks like it is revolving around us, etc.
• Geocentric- “Earth-centered”
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Geocentric Model
• However, the planets did not move regularly. This model could not explain this phenomenon.
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Retrograde Motion
https://www.youtube.com/watch?v=kbynKfNfHk4
Planet= Wanderer
Planets seem to form a loop, or “wander” in the sky
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Ptolemy’s- Geocentric Model
Accounted for Retrograde Motion with the use of “epicycles”
https://www.youtube.com/watch?v=utH-GHH1FT8
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Downfall of Ptolemy’s Model
The model was too complicated-
“In the physical sciences, simplicity has so often proved to be an indicator of truth.”
Example- telling a lie vs. telling the truth
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Section 2.3(assigned Wednesday)
The Heliocentric Model- “Sun-centered”
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Nicolas Copernicus
Not the first person to think of the Heliocentric model (Aristarchus of Samos- 320BC), but refined the model
His heliocentric model was simpler than Ptolemy’s while still accounting for retrograde motion
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Copernicus-Retrograde Motion
If Earth moves faster than Mars in orbit, then Earth will eventually “overtakes” Mars. Mars will then appear to move backward
Examples?
https://www.youtube.com/watch?v=kbynKfNfHk4
Apparent looping motions (vs. Real looping motions (Ptloemy)
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Copernican Revolution
“The critical realization that Earth is not at the center of our universe” - Text Book
Why is this a “critical realization?”
Not accepted for 200+ yearsNot enough data to convince Catholic Church
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Copernican Revolution/Scientific Revolution
Tycho Brahe: Collected VERY accurate Data
Johannes Kepler:Assistant to Brahe: used data to develop laws of planetary motion
Franics Bacon: Developed Scientific Method
Galileo GaliliFirst to use the telescope to study the stars, used observations to support Copernican Model