Front

AXIS

Back

an imaginary line about which a body rotates.

Front

ROTATION

Back

the action of rotating around an axis or center.

Front

REVOLUTION

Back

THE MOVEMENT OF AN OBJECT AROUND ANOTHER OBJECT

Front

ORBIT

Back

THE PATH OF AN OBJECT AS IT MOVES AROUND ANOTHER

OBJECT IN SPACE

Front

SOLSTICE

Back

the time or date (twice each year) at which the sun reaches its maximum or minimum DISTANCE FROM THE EQUATOR, marked by the longest and shortest days

Front

EQUINOX

Back

the time or date (twice each year) at which NEITHER HEMISPHERE IS TILTED TOWARDS OR AWAY FROM THE SUN

Front

GRAVITY

Back

THE ATTRACTIVE FORCE BETWEEN OBJECTS. THE FORCE THAT MOVES OBJECTS DOWNHILL

Front

LAW OF UNIVERSAL GRAVITATION

Back

The scientific law that states that every object in the universe attracts every other object.

Front

INERTIA

Back

a tendency to do nothing or

to remain unchanged