warm-up (in your journal) 1.during which months do you think the following pictures were taken?...

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?

OBJECTIVEOBJECTIVESWBAT evaluate how planetary

motion leads to season changes.

AGENDAAGENDA

Warm UpThe Sun and the Seasons VideoRevolution vs. Rotation? DemoGuided Practice WorksheetThe Seasons FoldablePostcardExit Ticket

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

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

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

VIDEO(while watching,

complete your video guide)

VIDEO(while watching,

complete your video guide)

• 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

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

• So this is what the Earth looks like right?axis

• And it revolves around the sun like this right?

This shows orbit

This shows orbit

WRONG!

• 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

• The Earth’s orbit actually looks like this

This shows orbit

15

Like What?

http://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?chapter_no=visualization

LETS SEE THIS!!

warmer

cooler

Projector= SunGlobe=Earth

• 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

• 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

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.

Tilt (towards/neutral/away)

Radiation (high/neutral/l

ow)

Temperature

(warm/moderate

/cool)

Season

• Winter• When the Earth is tilted away from the

sun.• Coldest temperatures

Top tilted away from

sun= winter

• 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

• Summer• When the Earth is titled toward

the sun.• Warmest temperatures

Top titled toward the

sun= summer

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

• 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?

26

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

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.

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1

23

4

1. Alaska2. South

Africa3. Brazil4. England

1. Alaska2. South

Africa3. Brazil4. England

EXIT SLIPEXIT SLIP

HANDOUT!!!