Season Vocabulary Seasons A pattern of temperature changes

Season Vocabulary • Seasons – A pattern of temperature changes & other weather trends over a year.

Season Vocabulary • Equator – Imaginary line which separates the Northern from the Southern Hemisphere • Earth rotates around an imaginary line running through its center called an axis of rotation. • The ends of the axis are the north and south poles. • Earth turns/rotates on its axis once in 24 hours. (Actually 23 hours and 56 minutes)

Season Vocabulary • The side of the Earth in the sunlight is called daytime. • The side of the Earth in the darkness is nighttime. • Earth’s rotation is reason for day & night • The Earth is tilted at about a 23 ½ degree angle from its orbit around the Sun. • Earth’s tilted axis and orbit cause seasons

Season Vocabulary • A revolution is the motion of one object around another once. • It takes one year for Earth to make one revolution around the Sun or 365 ¼ days. • Leap year every 4 years – add up ¼ days • Earth travels in an elliptical orbit around the sun. It resembles an elongated oval-shape. Out of all the planets, Earth’s orbit is the closest to a perfect circle. • Earth is the 3 rd planet from the sun.

Season Vocabulary • Solstice – Period of time when one hemisphere gets its maximum area of sunlight, while the other hemisphere gets its minimum amount; the time of year when days are either longest or shortest and the angle of sunlight reaches its maximum or minimum. Winter & Summer – usually 21 st of December and June • Earth is closest to the sun in December but Northern Hemisphere is tilted away – winter solstice – colder temperatures/shorter days • Earth is furthest from the sun in June but Northern Hemisphere is tilted toward the sun – hotter temps. /longer days – summer solstice

Season Vocabulary • Equinox – Period of time in an orbit in which sunlight shines equally on the Northern Hemisphere and the Southern Hemisphere; a time of year when daylight and darkness are nearly equal for most of the Earth. (Happens twice a year). Spring & Fall or March & September • Equinox means literally – “equal night”

Season Vocabulary • Together the tilt of the Earth and the angle of sunlight are the reason for seasons on Earth!

Seasons…in a nut shell

Exit Ticket • When it is December and winter in the Northern Hemisphere, what season is taking place in December in the Southern Hemisphere?

Season Vocabulary Together the tilt and the angle of sunlight are the reason for seasons!