Here's the breakdown:

* Speed: How fast something is moving. It's a scalar quantity, meaning it only has magnitude (e.g., 50 miles per hour).

* Direction: The path or course something is moving along.

* Velocity: A vector quantity that combines both speed and direction. It tells you how fast something is moving *and* in what direction (e.g., 50 miles per hour north).

Example:

* A car traveling at 60 miles per hour has speed.

* A car traveling 60 miles per hour north has velocity.

Key takeaway: Velocity is speed with a specified direction.