* Speed is a scalar quantity, meaning it only has magnitude (how fast something is moving).

* Velocity is a vector quantity, meaning it has both magnitude and direction.

A speedometer tells you how fast you are going, but it doesn't tell you which direction you are going. To know your velocity, you would need to know both your speed and direction.

Example:

* You're driving at 60 mph (speed).

* Your speedometer will show 60 mph.

* But your velocity could be 60 mph east, 60 mph west, or 60 mph north, depending on which direction you are traveling.