Here's a breakdown:

* Energy: Mechanical waves transfer energy from one point to another without the actual transfer of matter. Think of a ripple in a pond - the water itself doesn't travel across the pond, but the energy of the wave does.

* Momentum: Momentum is a measure of an object's mass in motion. While a mechanical wave doesn't transport matter, it can still transfer momentum. This is because the wave's oscillations cause particles in the medium to move, and this movement carries momentum.

Important Note: Mechanical waves require a medium to travel through. This medium can be solid, liquid, or gas. The particles in the medium oscillate, transferring energy and momentum without permanently moving the medium itself.