warm-up (in your journal) 1.during which months do you think the following pictures were taken?...
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Warm-Up Warm-Up (in your JOURNAL)(in your JOURNAL)Warm-Up Warm-Up (in your JOURNAL)(in your JOURNAL)1.During which months do you think the following
pictures were taken?
(A) (B)
2.Where does almost all the heat on Earth come from? What specific type of heat transfer allows this heat to get to Earth? (conduction, convection, or radiation?)
3. If an object is closer to the sun, do you think it will have a higher or lower temperature?
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OBJECTIVEOBJECTIVESWBAT evaluate how planetary
motion leads to season changes.
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AGENDAAGENDA
Warm UpThe Sun and the Seasons VideoRevolution vs. Rotation? DemoGuided Practice WorksheetThe Seasons FoldablePostcardExit Ticket
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QUOTE OF THE DAYQUOTE OF THE DAY
“Nobody can go back and start a new beginning, but anyone can start today and make a new ending.”
~Maria Robinson
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The planet…What do we know?The planet…What do we know?
• All the planets in our solar system revolve around the sun.
• But how?
• Kepler discovered elliptical planetary orbits
• All the planets in our solar system revolve around the sun.
• But how?
• Kepler discovered elliptical planetary orbits
B
C
A
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Kepler’s Law AppliedKepler’s Law Applied
• http://www.windows2universe.org/physical_science/physics/mechanics/orbit/orbit_shape_interactive.html
• http://www.windows2universe.org/physical_science/physics/mechanics/orbit/orbit_shape_interactive.html
6
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VIDEO(while watching,
complete your video guide)
VIDEO(while watching,
complete your video guide)
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• The Earth rotates on its axis • 1 full rotation = one day
• Looking at the picture below, why is the left hemisphere experiencing a warm day and the right hemisphere experiencing a cooler night?
DAYwarmer
NIGHTcooler
Comparing Rotations:
Earth=24 hrs
Mercury=59 days
Pluto=6 days
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The Earth orbits (revolves around) the sun
How long is one full revolution? 365 days
=
1 year
Comparing Revolutions:
Earth=365.25 days
Mercury=88 days
Oluto=248 years
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• So this is what the Earth looks like right?axis
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• And it revolves around the sun like this right?
This shows orbit
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This shows orbit
WRONG!
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• Earth’s axis is not straight– Earth’s axis is tilted 23.5° from
vertical
• Earth’s axis is not straight– Earth’s axis is tilted 23.5° from
vertical
13
23.5° tilt
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• The Earth’s orbit actually looks like this
This shows orbit
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15
Like What?
http://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?chapter_no=visualization
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LETS SEE THIS!!
warmer
cooler
Projector= SunGlobe=Earth
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• Why does that matter?The Earth’s tilted axis allows us to
have seasons• 4 seasons based on Earth’s position to the sun
Winter
Summer
FallSpring
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• So what does this look like for us, in the Northern Hemisphere?? For each part of the
demo, fill out your chart based on what is represented by each specific location:1)tilt (towards/away)2)Radiation (high/neutral/low)3)Temperature (warm/moderate/cold)4)Season
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FAST FACTFAST FACT
• The star "Lucy" in constellation Centaurus is actually a huge cosmic diamond of 10 billion trillion trillion carats.
• The star "Lucy" in constellation Centaurus is actually a huge cosmic diamond of 10 billion trillion trillion carats.
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Tilt (towards/neutral/away)
Radiation (high/neutral/l
ow)
Temperature
(warm/moderate
/cool)
Season
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• Winter• When the Earth is tilted away from the
sun.• Coldest temperatures
Top tilted away from
sun= winter
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• Spring• Moderate
(medium) temperatures
• Starts cold and gets warmer as that part of Earth is tilted toward the sun
Beginning to be tilted
toward the sun= spring
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• Summer• When the Earth is titled toward
the sun.• Warmest temperatures
Top titled toward the
sun= summer
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Autumn (fall)• Moderate
(medium) temperatures
• Starts warm and gets cooler as that part of Earth is tilted away from the sun
Beginning to be tilted
away from the sun=
spring
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• The equator divides the earth into top and bottom halves (Northern and Southern hemisphere)
• Because of the tilt of the earth, the hemispheres have opposite seasons.
WHY?
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FOLDABLEFOLDABLE
27
FRONT
BACK
INSIDEWIN
TE
R
SPR
ING
AU
TU
MN
SU
MM
ER DRAWING
DESCRIPTION
DRAW
ING
DRAWING
DESCRIPTION
Draw a picture to show the Earth orbiting around the sun. Draw the Earth in the 4 main positions.Use arrows to show the direction the Earth is moving.On your arrows, describe what the temperature is doing.Label the four seasons.
DESCRIPTION
DRAW
ING
DESCRIPTION
DRAW
ING
DESCRIPTION
DRAW
ING
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POSTCARDPOSTCARD• Pick a place on the map you will travel to
over the summer.• Write a postcard telling your friend what
season it is there. Explain why it is that season. Describe what the temperature is like.
• For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season.
• Pick a place on the map you will travel to over the summer.
• Write a postcard telling your friend what season it is there. Explain why it is that season. Describe what the temperature is like.
• For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season.
28
1
23
4
1. Alaska2. South
Africa3. Brazil4. England
1. Alaska2. South
Africa3. Brazil4. England
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EXIT SLIPEXIT SLIP
HANDOUT!!!