Question

mechanical waves (sound waves) are unable to travel through a vacuum, such as through space, but radio waves are transmitted to earth from satellites. how is this possible?
radio waves are a form of electromagnetic waves.
satellites are located within our atmosphere, therefore there is matter to transport the waves.
radio waves are very high energy mechanical waves.
radio waves are changed to gamma rays for transmission.

Explanation:

Mechanical waves (like sound) need a medium (matter) to travel, but electromagnetic waves (like radio waves) do not. They can propagate through a vacuum (space). Satellites are in space (vacuum), so radio waves (electromagnetic) can travel from them to Earth. The other options are incorrect: satellites are in space (not within Earth's atmosphere for wave transmission), radio waves are not mechanical waves, and radio waves don't change to gamma rays for transmission.

Answer:

A. Radio waves are a form of Electromagnetic Waves.