* Acceleration due to gravity is constant: Near the Earth's surface, the acceleration due to gravity is approximately 9.8 m/s². This means that for every second an object falls, its downward velocity increases by 9.8 meters per second.

* Speed changes over time: The speed of a falling object does not remain constant. It starts at 0 m/s and increases as it falls.

Here's the key difference:

* Acceleration is the rate of change of velocity. It's how quickly the object's speed is increasing.

* Speed is how fast the object is moving at a given moment.

Example:

Imagine dropping a ball. At the moment you release it, its speed is 0 m/s. After 1 second, its speed is 9.8 m/s. After 2 seconds, its speed is 19.6 m/s, and so on.

Important Considerations:

* Air resistance: In reality, air resistance can slow down a falling object, making its speed less than what it would be in a vacuum.

* Terminal velocity: As an object falls, air resistance increases. Eventually, the force of air resistance will equal the force of gravity, and the object will stop accelerating. This is called terminal velocity.

Let me know if you have any other questions!