Earth Systems and Cycles

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

The process in which the earth turns

around one time(s). One rotation

takes one day.

rotation

Memory Trick

ro-DAY-tion

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

The process in which the earth makes

one complete circle around the sun.

This takes one year.

revolution Memory Trick

• 4 syllables and 4 seasons

• re-vo-lu-tion

• spring, winter, summer, fall

elliptical orbit

earth

moon

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.

elliptical orbit

gravity

The ______ that pulls one object

toward another.

gravity

The force that pulls one object

toward another.

gravity

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.

revolve

rotate

The _______ of Earth on its axis.

rotate

The spinning of Earth on its axis.

rotate

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.

axis