Presentation on the seasons of the earth, what causes a change in seasons, the average tempreture, humidity, etc during each season in both the northern and southern hemispheres.

1. Seasons of the earth:

2. Key Words
Revolution - The movement of the Earth around the Sun in a fixed path, The Earth
revolves from west to east, i.e., in the anticlockwise direction. The one revolution of
the Earth around the Sun takes around one year or precisely 365.242 days.
Earth’s tilt - Earth's axial tilt (also known as the obliquity of the ecliptic) is about 23.5
degrees.

3. What are the 4 seasons ?
Summer
Winter
Spring
Fall

4. Summer
Summer is the hottest of the four
temperate seasons, occurring after
spring and before autumn. At or
centred on the summer solstice,
daylight hours are longest and
darkness hours are shortest, with day
length decreasing as the season
progresses after the solstice.
Southern hemisphere - December, January, and February
Northern hemisphere - June, July, and August

5. Autumn
Autumn is the season after summer
and before winter. In the United States
this season is also called fall. In the
Northern Hemisphere, it is often said
to begin with the autumnal equinox in
September and end with the winter
solstice in December. In the Southern
Hemisphere, it runs from the autumnal
equinox in March to the winter solstice
in June.
Southern hemisphere - March, April, May ,
Northern hemisphere - September, October, November

6. Winter
Winter is the coldest season of the
year in polar and temperate climates.
It occurs after autumn and before
spring. The tilt of Earth's axis causes
seasons; winter occurs when a
hemisphere is oriented away from the
Sun.
Southern hemisphere - June, July, August
Northern hemisphere - April, May, June

7. Spring
spring, in climatology, season of the
year between winter and summer
during which temperatures gradually
rise. The spring temperature transition
from winter cold to summer heat
occurs only in middle and high
latitudes; near the Equator,
temperatures vary little during the
year. Spring is very short in the polar
regions.
Southern hemisphere - September, October, November
Northern hemisphere - January, February, March

8. What causes seasons ?
As the earth spins on its axis, producing night
and day, it also moves about the sun in an
elliptical (elongated circle) orbit that requires
about 365 1/4 days to complete. The earth's
spin axis is tilted with respect to its orbital
plane. This is what causes the seasons.

9. Thank You
For Listening !!!