Tropic Of Cancer 23 1/2

Tropic Of Capricorn 23 1/2

Equator 0

Antarctic Circle 66 2/3

Arctic Circle 66 2/3

North Pole 90

South Pole 90

Prime Meridian O

°

°°

°

°

°

°

°

EARTH

Latitude (Lat is Flat) are lines that run parallel from pole to pole. “Pieces of Bread” “parallels”Zero degree at the equator to 90° degree at the poles

Longitude, are lines that run from North Pole to South Pole“Apple wedges” “Meridians”Zero degree at the Prime Meridian up to 180°degree on the other side of the world, then the numbers work there way back to the Prime Meridian

AMOUNT OF DAYLIGHT AT EARTH’S SURFACE

ACTUAL OBSERVATIONS

AS YOU GO FURTHER AWAY FROM THE EQUATOR THE AMOUNT OF DAYLIGHT INCREASES IN THE SUMMER AND DECREASES IN THE WINTER.

THE EQUATOR HAS APPROXIMATELY 12 HOURS OF DAYLIGHT ALL YEAR ROUND

THE NORTH POLE HAS 24 HOURS OF DAYLIGHT IN THE SUMMER AND 24 HOURS OF NIGHT IN THE WINTER.

ON SEPTEMBER AND MARCH 22, ALL AREAS ON EARTH HAVE 12 HOURS OF DAY AND 12 HOURS OF NIGHT.

SEPTEMBER AND MARCH 22

SunDirect Rays from the Sun are at the Tropic of Cancer

Equator

North Star

23 ½ N°

Indirect Rays

June 21st

Summer Solstice

No daylight below Antarctic Circle

No darkness above Arctic Circle

JUNE 21

Sun

Sept 21/22 First day of Fall, and March 21/22 First Day of Spring

Direct Rays

Direct rays of the sun are at the Equator (equal amount of daylight and darkness)

DECEMBER 21

Sun

23 ½ S°Dec 21 First day of Winter “shortest day of the year” “Winter Solstice”

Direct Rays

Indirect Rays

Indirect Rays

Direct rays of the sun reach the furthest southern point

constant daylight

constant darkness

EARTH IS TILTEDA TILTED EARTH WOULD EXPLAIN MOST OF THE OBSERVATIONS THAT WE SEE .

THE EARTH IS TILTED AT A 23.5 DEGREE ANGLE.

Sun

Direct Rays at the Equator

12 hrs of daylight, 12 hours of darknessEquinox – “equal night”

Sept 21 (Autumnal Equinox)March 22 (Spring Equinox)

REVOLUTIONTHE TILT OF THE EARTH, ALONE, WOULD NOT ACCOUNT FOR THE CHANGE IN THE PATH OF THE SUN.

IF THE EARTH WERE TO REMAIN IN ONE POSITION IN SPACE, ONE HEMISPHERE WOULD EXPERIENCE SUMMER WHILE THE OTHER WOULD EXPERIENCE WINTER.

Portoviejo

kids.msfc.nasa.gov/Earth/ Seasons/Seasons.htm

Animated Gif on seasons from NASA