Here's why:

* Scalar: Refers to a quantity that has only magnitude (size or amount).

* Vector: Refers to a quantity that has both magnitude and direction.

For example:

* Scalar: Temperature (e.g., 25 degrees Celsius), mass (e.g., 5 kilograms), speed (e.g., 10 meters per second)

* Vector: Velocity (e.g., 10 meters per second east), force (e.g., 10 Newtons downward), displacement (e.g., 5 meters north)