* Speed is a scalar quantity, meaning it only has magnitude (size). It tells you how fast something is moving. For example, a car traveling at 60 mph has a speed of 60 mph.
* Velocity is a vector quantity, meaning it has both magnitude and direction. It tells you how fast something is moving *and* in what direction. For example, a car traveling at 60 mph due north has a velocity of 60 mph north.
Here's an analogy:
Imagine two cars driving at 60 mph. One car is traveling north, and the other is traveling east. Both cars have the same speed, but their velocities are different because they are moving in different directions.
In summary:
* Speed: How fast something is moving.
* Velocity: How fast something is moving *and* in what direction.
