In brief, Scalar quantity refers to the physical quantities that have only magnitude and no specific direction associated with them. These can be described simply by their size or amount. Examples of scalar quantities include time, speed, volume, density, and temperature. On the other hand, vector quantity involves physical quantities that have both magnitude and direction. This implies that when representing a vector quantity, you must specify both its size and the angle at which it acts in space. Some common examples of vector quantities are displacement, velocity, acceleration, force, and momentum. Enroll with Tutoroot.