* 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.

Example:

* A car traveling at 60 mph (speed) is moving at a specific rate.

* If that same car is traveling at 60 mph eastward (velocity), it has both a speed and a direction.

In summary:

* If an object is moving in a straight line without changing direction, its speed and the magnitude of its velocity are the same.

* However, if an object changes direction (even while maintaining the same speed), its velocity will change because direction is a component of velocity.