What is the #1 difference between mechanical and electromagnetic waves?

Electromagnetic waves are usually defined as those waves that are produced because of the vibration between a magnetic as well as an electric field. They can easily travel in space (or in a vacuum) and they have the ability to carry or transmit energy.

On the other hand, the mechanical waves are defined as those waves that can travel only through a medium such as air, water or any liquid, but they cannot travel in a vacuum. They are able to transmit energy only through the mediums.

magnitude and direction

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.