Final answer:
All objects near the surface of the Earth accelerate downward due to gravity at a rate of 9.8 m/s², except on Earth air resistance affects the acceleration of falling objects.
Step-by-step explanation:
All objects near the surface of the Earth accelerate downward due to gravity at a rate of 9.8 meters per second per second (9.8 m/s²). This means for every second it falls, the object will get faster by 9.8 meters per second. However, on Earth, the force of air resistance is acting on the falling object, which can affect its acceleration and make it different from the constant acceleration due to gravity.