Final answer:
A scalar quantity is defined by magnitude and a vector quantity by magnitude and direction. Time is an example of a scalar, and displacement is a vector. Speed is a scalar, while velocity is a vector that includes direction, such as a car moving east at 100 km/h.
Step-by-step explanation:
The answer to the first review question is a. scalar, vector. A scalar quantity is fully described by its magnitude, while a vector requires both magnitude and direction to be fully described. An example of a scalar quantity would be time, and an example of a vector quantity would be displacement.
For the second review question, the answer is a. scalar, vector. Speed is a scalar quantity which means it is described completely by magnitude alone and velocity is a vector quantity, implying that it is described by both magnitude and direction. For instance, a car traveling east along a highway at 100 km/h is described by the velocity vector which includes both the speed (100 km/h) and the direction (east).