Seasons

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Seasons Reasons
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SEASONS
The Seasons are divisions of the year which
relate to the annual changes in the weather. The
classical division into the four seasons Winter,
Spring, Summer, and Autumn (Fall)
Derives from the weather pattern in middle
latitudes where the onset of growth in plants
and the reawakening of nature from a period of
stasis can be separated from the hot season,
when crops ripen and trees lose their leaves,
and the cold season.
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Cause of The Seasons
The cause of the seasons is that the plane of the
Earth's orbit around the Sun is inclined to the
plane of the Equator.
This means that the direction of the Sun's rays
relative to the ground and the number of daylight
hours change during the year and hence the
amount of solar energy received at different
latitudes changes during the year.
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Astronomically the arrangement of the planes of
the orbit of the Earth and its equator are such
that the planes intersect at two times, the
Equinoxes, when the length of the day and night
are equal.
What is Equinox?
Mid-way between these are the Solstices, when the
Sun is at its highest and lowest in the sky at
mid-day.
These times can be determined very accurately
and, as they occur near the times when the
seasons are changing, have been used to indicate
the start of each season.
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Thus Spring is deemed to start at the Vernal
Equinox (near March 21), Summer at the Summer
Solstice (near June 21), Autumn at the Autumn
Equinox (near September 21) and Winter at the
Winter Solstice (near December 21). In the
southern hemisphere the cycle is displaced by
half a year.
The positions of earth at the different
seasons. Counterclockwise from lower left
summer, fall, winter, spring (northern
hemisphere).
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WINTER
In  winter the days are shorter and the nights
longer. That means there is less time for the
sun to warm us during short winter
days. Freezing!!! And winter has long cold nights.

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SPRING
Spring has arrived. The snows of winter are
gone, and wild flowers will soon be blooming.
The world seems filled with new life and new
hopes. It's time to find swimming suits and
baseball gloves and plan summer trips. 

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SUMMER
When the North Pole points toward the sun, the
sun's rays hit the northern half of the world
more directly. That means it is warmer and we
have summer.
Summer is even warmer and winter is colder
because of the length of our days and nights. In
the summer daylight lasts longer and nighttime is
shorter.

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FALL
It is almost autumn, the season of change! In
the north the hottest days of summer are past and
each day is shorter than the last. Trees will
soon turn brilliant colors. Summer vacation is
over and school is in full swing. Soon it will
be time for hot cocoa and warm coats. 

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