seasons

causes of vernal equinox

Now the Earth has positioned itself similar to that which occurs in *September*, only on the other side of the Sun. the tilt is causing the seasons to change.

causes of winter solstice

At noon on this day, the place where the sun lies directly overhead is located at *23.5 degrees* south latitude (Tropic of *Capricorn*). This is as far *south* that the sun will be directly overhead.

the reason why we have seasons

Because the earths tilted like summer is direct angle and winter is when it's not at a direct angle and that is why we have seasons.

Vernal Equinox (Spring)

Occurs in March and marks the beginning of spring in the Northern Hemisphere.Occurs around *March 21-23* (this is the beginning of *spring* in the Northern Hemisphere and the beginning of fall in the *southern* Hemisphere). Vernal means spring.

Solstices

The point at which the sun is as far north or as far south of the equator as possible.The solstices are days when the Sun reaches its farthest *northern* and *southern* path. The farthest of south would be tropic Capricorn and the sun is never directly overhead and the tropic of cancer would be where we live.winter is -25, spring is 0 in suns path, summer with umbrella handle next to each other, and fall is -25.

Cause of seasons

The tilt of the Earth's axis.The Earth's seasons are not caused by the differences in the *distance* from the Sun throughout the year (these differences are extremely small). Instead, the seasons are the result of the *tilt* of the Earth's axis. We are furthest away in June and closet in July.

causes of summer solstice

At noon on this day, the place where the sun lies directly *overhead* is located at 23.5° north latitude (Tropic of *cancer*). This is as far north that the sun will be directly overhead. Arctic of circle will only get morning and no night. The antarctic circle will get only night and no day.

Summer Solstice

Day with the most hours of sunlight and the fewest hours of darkness.Occurs on *June 21st* and marks the beginning of *summer* in the northern hemisphere (this is the *longest* day of the year).

Winter Solstice

December 22, when the sun is at its southernmost point.Occurs on *December 21 or 22*, and marks the beginning of *winter* in the northern hemisphere (this is the *shortest* day of the year).

North Pole

the northernmost point of the Earth's axis.Because the *north pole* tips towards the Sun, its rays strike at the Arctic and Antarctic Circles at a *wide* angle. This creates a 24 hour period of *daylight* for places located north of 66.5° north. Also, the South Pole is tipped *away* from the Sun, sending places south of 66.5° south into 24 hours of *darkness*. If you take 90 degrees north latitude and will be 90-minus the tilt so that's Antarctic get 66.5.

South Pole

the southernmost point of the Earth's axis.Because the South Pole tips *towards* the Sun, its rays strike at the Arctic and Antarctic Circles at a wide angle. This creates a 24 hour period of daylight for places located *south* of 66.5° south. Also, the North Pole is tipped *away* from the Sun, sending places north of 66.5° north into 24 hours of *darkness*.

Equinoxes

the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about September 22 and March 20).Equinoxes are days in which day and night are of *equal* duration. The two yearly equinoxes occur when the Sun crosses the celestial *equator*.

causes of autumnal equinox

By now, the Earth has moved around the *sun* such that the poles are neither pointing toward nor away from the sun. On this day, the Sun is directly *overhead* at 0° degrees, or the equator, at *noon*. On the autumnal equinox, all places experience *12* hours of daylight and 12 hours of *darkness*.

autumnal equinox

Occurs when the sun is directly overhead at the equator and results in day and night of equal length for both northern and southern hemispheres, September 22nd.Occurs around *September 21-23* (this is the beginning of *fall* in the Northern Hemisphere and the beginning of *spring* in the Southern Hemisphere). Hemisphere is opposite in the other hemisphere.

earths axis direction

The Earth's axis always remains pointing in the *same* direction as it revolves around the sun. Summer is warmer than winter (in each hemisphere) because the Sun's rays hit the Earth at a more direct *angle* during summer than during winter.

the number the earths axis is tilted

The Earth's axis is tilted from perpendicular to the plane of the ecliptic by *23.5 degrees*. This tilting is what gives us the four seasons of the year - spring, summer, autumn (fall) and winter. Since the axis is tilted, different parts of the globe are oriented towards the *sun* at different times of the year. Know this including the number, it is important.

length of the day

The orientation of the Earth with respect to the Sun also determines the *length* of day. Together, the sun angle and day length determine the total amount of *solar* radiation hitting the Earth.