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13 Cards in this Set

  • Front
  • Back

AXIS

an imaginary axle that a planet spins on

EQUATOR

the imaginary circle around Earth or a celestial object that is everywhere the same distance from thepoles

HORIZON

the imaginary line where the sky meets Earth or the ocean

LATITUDE

the angular distance north or south from Earth’s equator

LINE OF SIGHT

the straight, unimpeded path taken by light from an object to an eye

LONGITUDE

the distance measured on Earth's surface east or west of the prime meridian

NORTH STAR

the reference star pointed to by Earth’s North Pole

ORBIT

the path and length of time one object takes to travel around another object

REVOLUTION

traveling around something

ROTATION

spinning on an axis

EQUINOX

a day of the year when the Sun’s rays shine straight down on the equator

SEASON

a period of the year identified by changes in hours of daylight and weather

SOLSTICE

a day of the year when Earth’s North Pole is leaning either toward the Sun or away from the Sun