Science TEK 6.9 A Vocabulary

Front

-the imaginary line through Earth that extends from the North Pole to the South Pole and is the center of Earth's rotation

Back

axis

Front

-temperatures are higher where the sun's rays are direct

Back

direct

Front

-half of a sphere; Earth and the celestial sphere can be divided into northern and southern or eastern and western hemispheres

Back

hemisphere

Front

-temperatures are lower where the suns rays are indirect

Back

indirect

Front

-a curved path followed by a satellite as it revolves around an object.

Back

orbit

Front

-the movement of one object around a center or another object.

Back

revolution

Front

-the four natural divisions of the year based on changes in temperature due to varying amounts of sunlight received; caused by the tilt of the earth during its revolution

Back

seasons

Front

-the slant of Earth's axis, which is 23.5 degrees from vertical compared to Earth's orbital plane around the sun; results in the North Pole always pointing toward the star.

Back

tilt