Seasons-Causes+Group+1

=//Seasons and Causes//=

Claire S. and Jessica H. - Blue 7 1. The revolution of Earth around the sun 2. Tilt of the Earth's axis - 23.5 is the tilt of Earth's axis 3. Axis always points in the same direction during rotation - Points towards the North star, Polaris Your science text book explains these causes in greater depth. (page 467-469)
 * __3 Main Causes__**

Hemisphere tilts toward sun has longer daylight and direct sunlight Hemisphere tilted away has shorter days and indirect sunlight Areas near the equator experience little difference in day length and seasonal temperatures During the summer the sun is farthest from Earth, this point in Earth's orbit is called Aphelion During the winter the sun is closest to the Earth, this point in Earth's orbit is called Perihelion
 * __Facts:__**

media type="youtube" key="taHTA7S_JGk" This clip is a little long but it really helps learn what the cause of seasons are. Another group has a shorter version which is good also. Here is the link to it : Other Group's Video

**__Height of Sun Throughout Seasons:__**


The suns path in the picture is shown as the bottom circle. In the picture the bottom path of the sun is the suns path in the winter because the days are shorter which is caused by the lower height of the sun at it's highest point. The Southern Hemisphere is experiencing summer while in the Northern Hemisphere it is winter.

The middle path of the sun represent the suns path during spring and autumn. During these seasons the sun comes 50 degrees above the horizon. There is an equal amount of sun in the Northern and Southern Hemisphere.

The top line represents the path of the sun during summer. During this season the sun reaches it's highest point in the sky for the Northern Hemisphere. The Southern Hemisphere is in winter whereas in the Northern Hemisphere it is summer. The sun in the Southern Hemisphere is at a lower height in the sky compared t the height it is in the Northern Hemisphere.


 * __Summer:__** Summer Solstice June 21

Northern Hemisphere has the maximum tilt toward the sun North Pole has 24 hours of sunlight Southern Hemisphere tilted away from sun During the summer the sun is closest to the Earth, this point in Earth's orbit is called Perihelion


 * __Winter:__** Winter Solstice December 21

Shortest Day of the year Northern Hemisphere is at its maximum tip away from the sun Opposite daylight and nighttime conditions than summer solstice - North Pole 24 hours of darkness Southern Hemisphere is tilted towards sun

Spring Equinox- March 21 Autumn Equinox- September 23 More information on equinoxes and solstices
 * __Spring and Fall__**

~Your Equinox quiz is also helpful for your study