Seasons What do you know about seasons?. Seasons A season is one of the major divisions of the...
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Transcript of Seasons What do you know about seasons?. Seasons A season is one of the major divisions of the...
Seasons
What do you know about seasons?
SeasonsA season is one of the major divisions of the year, generally based on
yearly periodic changes in weather.
SeasonsSeasons result from the yearly
revolution of the Earth around the Sun and the tilt of the Earth's axis.
Rotation vs. RevolutionRotation is the spin of an object
about its axis.The Earth rotates once a day (once
every 24 hours).Revolution is the orbit of one
object around another.The Earth revolves around the Sun
every 365.26 days.
How does the 23.5 degree tilt of the Earths axis affect SEASONS?
The Earth’s Axis is ALWAYS TILTED the SAME direction.
Sometimes the EARTH’S AXIS is TILTED AWAY from the sun. (that’s Winter in the Northern Hemisphere)
Sometimes the EARTH’S AXIS is TILTED TOWARDS the sun. (THE SUMMER in the Northern Hemisphere)
When the EARTHS AXIS is simply on its side… That’s Spring or Fall.
Summer solstice Winter solstice
+
Links to animations below
Equinox animation
Equinox
Check out these video clips! http://www.youtube.com/watch?
v=DuiQvPLWziQ http://www.youtube.com/watch?
v=taHTA7S_JGk&feature=related
http://www.youtube.com/watch?v=taHTA7S_JGk&feature=related
http://www.youtube.com/watch?v=O9hawBb3wbk
What do you think….rotation or revolution…What causes day and night?What happens when the Earth
completes one revolution?What happens when the Earth
completes one rotation?What does the Earth revolve
around?
Summer vs. Winter
.
What do you observe in this picture?
.
Some cool facts to help you remember….
Sol (from the word Solstice)= sun Stice ( from the word Solstice)= standing
still Equ- (from the word Equinox)= equal Nox (from the word Equinox)= night
How can this help you to remember the seasons?
Do you know…
What month does the solstice occur?
What month does the equinox occur?
Seasons During June, July, and August; the northern
hemisphere is exposed to more direct sunlight because the northern hemisphere faces the sun. How does this affect us?
The same is true of the southern hemisphere in December, January, and February.
Something to think about… Which hemisphere do we live in? When were having
summer, what do you think is happening in the other hemisphere?
Sun’s Rays
What season does this picture reflect in the Northern Hemisphere? What is the first day of this season called?
Seasons
What observations can you make about the tilt of the axis in each phase?
What season is this in the Northern Hemisphere?
Include the SUN, the EARTH, the TILT OF THE AXIS, and the EQAUTOR
What would happen…
if the Earth wasn’t tilted on its axis?
All 4 SEASONS- Can you explain this picture?
Get Ready for Tim and Moby!.