Earth Systems and Cycles

rotation

rotation The process in which the earth turns around _____ time(s). One rotation takes one _____.

rotation The process in which the earth turns around one time(s). One rotation takes one day.

rotation ro-DAY-tion The process in which the earth turns Memory Trick rotation ro-DAY-tion The process in which the earth turns around one time(s). One rotation takes one day.

revolution

revolution The process in which the earth makes one complete circle around the ___. This takes one _______.

revolution The process in which the earth makes one complete circle around the sun. This takes one year.

revolution re-vo-lu-tion 4 syllables and 4 seasons Memory Trick 4 syllables and 4 seasons re-vo-lu-tion spring, winter, summer, fall The process in which the earth makes one complete circle around the sun. This takes one year.

moon earth elliptical orbit

elliptical orbit The oval or egg-shaped path of the _____ around the Earth. One orbit takes about one ______.

elliptical orbit The oval or egg-shaped path of the moon around the Earth. One orbit takes about one month.

gravity

gravity The ______ that pulls one object toward another.

gravity The force that pulls one object toward another.

revolve

revolve To travel in a closed ____ around an object such as Earth does as it moves around the sun.

revolve To travel in a closed path around an object such as Earth does as it moves around the sun.

rotate

rotate The _______ of Earth on its axis.

rotate The spinning of Earth on its axis.

axis

axis An imaginary line that passes through Earth’s center and its _____ and _____ poles.

axis An imaginary line that passes through Earth’s center and its north and south poles.