2/5/14 shine like a star with your warm-up
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2/5/14 Shine Like A Star With Your Warm-Up. Are there more grains of sand on Earth or stars in the universe? What is a leap year? Why do we have leap years? How big is the Earth compared to the Sun? How big is our Sun compared to other stars? - PowerPoint PPT PresentationTRANSCRIPT
2/5/14 Shine Like A Star With Your Warm-Up
1. Are there more grains of sand on Earth or stars in the universe?
2. What is a leap year? Why do we have leap years?
3. How big is the Earth compared to the Sun?4. How big is our Sun compared to other stars?5. Why is the Equator warmer than the North
and South Poles?
Do Now 2/6/14
Define the following words:1. Astronomy2. Geocentric model3. Heliocentric model4. Revolution5. Rotation
Do Now 2/7/14
1. Put the following in order from largest to smallest: solar system, sun, galaxy, universe, planet
2. Where did the study of astronomy originate?3. If you could travel to any planet which one
would it be? Why?
Look at the 7 pictures on the paper,answer question 1-3 on your paper
AstronomyASTRONOMY
Astronomy fill-in-the-blank
Start on page 614• First section chapter 21• 2nd section chapter 23
Scale of the Universe
http://htwins.net/scale/http://htwins.net/scale2/
First, some perspective. . .
Make Sure You Know This!
UniverseGalaxy
Solar SystemSun
Planets
How Old It Is How Big It Is
Scale of the Universe: One more way to think about it. . .
Think about Independence High School, which was built first, Room 209, or the
school?My room is like a planet, and the school is
like the solar system
Forget
The Earth in the UniverseThe Motion of our Home. . .
Earth Motions: Draw This In Your NotesThe Motion What It Is What It Causes Picture / Diagram
Rotation(Ro-tay-shun)
Revolution(Rev-o-lew-shun)
Precession(Pre-cess-shun)
Nutation(New-tay-shun)
Quick Video About Rotation
• http://player.discoveryeducation.com/index.cfm?guidAssetId=EF21D20B-2294-47B7-85A1-7C41B7A537A6&blnFromSearch=1&productcode=DETB
• Rotation• Counter-Clockwise Spinning on the axis• Takes about 24 hours, result is Day and Night• Without Rotation, there would be a burning hot
“Day” side and a freezing cold “Night side of the Earth
Why does the Earth spin?
http://www.youtube.com/watch?v=TQxeutcYP6I
• Revolution• The Earth’s counter-clockwise elliptical (oval
shaped) orbit around the sun• Takes 365 ¼ days, helps give us the seasons• If Revolution stopped one hemisphere would
experience eternal summer, while the other would experience winter
Revolution
• Precession• Earth is tilted 23.5⁰ off center, this means parts of
the Earth are closer to the Sun than other parts• Precession gives us seasons, because of the tilt, one
hemisphere or the other receives more sun light (summer), the other hemisphere gets less light (winter)
• If precession stopped, we wouldn’t have seasons. . .
• Nutation• Nutation is a wobble in the Earth’s precession
caused entirely by the moon’s gravity tugging on the Earth
• If nutation stopped, the “changing” location of stars in the Earth’s night sky would be limited
What do you see in this video?
http://www.youtube.com/watch?v=ZGaQXx5lDWo&feature=related
10 Rare Astronomical Events
http://www.youtube.com/watch?v=Xp4OIzvqE9k
Music Time. . .1. Split into pairs (choose wisely, this will be graded)2. On your Album/ Paper, create 8 (or more) song titles that show your knowledge of:– Where the Earth is in the universe, and the size of the Earth
compared to the rest of the universe- at least 1 title– The Earth’s motions (Rotation, Revolution, Precession,
Nutation)- at least 4 titles, one about each movement– What happens because of the Earth’s movements (Eclipses,
Seasons, Tides, etc.)- at least 2 title– What might happen if these movements stopped- at least 1 title
Funny is great, showing your knowledge is a must!!!You can use your notes (and the book if you really want)