All terms in this list:

Motion: The state in which one object's distance from another is changing

An object in motion, stays in motion.

Reference Point: A place or object used for comparison to determine if something is in motion

An object is in motion if it changes position relative to a reference point.

Meter: The SI unit of length

An Olympic-size swimming pool is 50 meters.

International System Of Units: A system of measurement based on multiple of ten and on established measures of mass, length, and time

In French, this system is called Systeme International

Speed: The distance an object travels per unit of time

If you know the distance an object in a certain amount of time, you can calculate the speed of the object

Average Speed: The overall rate speed at which an object moves

The average speed of the cyclist is the total distance divided by the total time

Velocity: Speed in a given direction

When you know both the speed and direction of an object's motion, you know the velocity of the object

Slope: The steepness of a line on a graph

The slope tells you how fast one variable changes in a relative to the other

Relative Motion: Relative motion is the calculation of the motion of an object with regard to some other moving object.

For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed.