* Acceleration is the rate of change of velocity. Velocity is a combination of speed and direction.

* Constant acceleration means the velocity changes by the same amount every second.

* Speed is the magnitude (or size) of velocity.

Therefore, if the velocity is consistently changing by the same amount, the speed must also be consistently changing.

Important Note: Constant acceleration doesn't necessarily mean the object is moving in a straight line. It could be moving in a circle at a constant speed, for example, because the direction of its velocity is changing.