* Motion: Motion is the change in position of an object over time. It's a general description of movement. Think of it as a broad concept that simply means something is moving. It doesn't tell you *how fast* or *in what direction* it's moving.

* Speed: Speed is a measure of how quickly an object is moving. It tells you the rate of change in position. Speed is calculated by dividing the distance traveled by the time taken. For example, a car traveling at 60 miles per hour is moving at a speed of 60 miles per hour.

Here's a simple analogy:

* Imagine you're watching a race. All the runners are in motion. But to compare how fast they are, you need to know their speed.

Key takeaway:

* Motion is a qualitative concept about movement.

* Speed is a quantitative measure of how fast something is moving.