Seasons & Earth's movements

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Terms in this set (...)

Axis
imaginary line through the earth from the north pole to the south pole around which the earth rotations
Poles, north and south
the places on the earth around which it rotates.
the axis goes through these spots
located at a 90 degree angle from the equator
tilt
The earth's axis is not straight up and down but tilted 23.5 degrees off.
This points it at the NORTH STAR
auses uneven amounts of light (or heat) to hit earth's surface, causing the seasons
Rotation
the spinning of the planet on its axis
causes day and night
takes 24 hours to complete one rotation
revolution
the movement of a planet (Earth)in its orbit (around the sun), it takes earth 365 1/4 days.
orbit
the path an object follows as it revolves
Seasons
the regular change in temperature that repeats year after year
causes of seasons
uneven heating of places on the earth's surface due to the tilt of earth's axis
Solstice
the day (twice a year) when the North Pole points either toward or away from the sun.
Equinox
the day (twice a year) when the sun shines directly on the EQUAtor, cause EQUAL amounts of daylight and darkness every where on the earth.
Equator
an imaginary line running around the middle of the earth dividing it into two halves (Northern & Southern Hemispheres)
Northern Hemisphere
all the area NORTH of the equator, includes the USA
What are the dates for the solstices & equinox for the Northern Hemisphere?
Southern Hemisphere
all the area South of the equator, includes the South America and Australia
What are the dates for the solstices & equinox for the Southern Hemisphere?
Vernal Equinox
Spring Equinox, (1/2 day, 1/2 night) the amount of daylight in that hemisphere is increasing.
Autumnal Equinox
Fall Equinox, (1/2 day, 1/2 night) point at which the amount of daylight is decreasing
Winter Solstice
longest night, shortest day of the year
Axis for that hemisphere is pointed AWAY from the sun
Summer Solstice
Longest DAY, shortest night of the year
Axis for that hemisphere is pointed TOWARD the sun
Longitude
Imaginary lines representing the number of degrees east or west of the Prime Meridian
Rule pole to pole
Latitude
Imaginary lines representing a location in degrees north or south of the equator
Leap Year
the calendar year with 366 days which occurs every four years to account for four, 1/4 days, that earth takes when revolving around the sun. This keeps our calendars on track.

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