The term that describes both the speed and direction of an object's motion is velocity.

Here's why:

* Speed tells you how fast an object is moving.

* Direction tells you which way an object is moving.

Velocity combines both of these elements into a single measurement. For example:

* A car traveling at 60 miles per hour east has a velocity of 60 mph east.

* A ball thrown upwards at 10 meters per second has a velocity of 10 m/s upwards.