I do not think there is anything that does not require matter. Matter has mass, and mass is the same as energy, so if something does not have mass or energy, it does not exist. Even the smallest elementary particle, the muon neutrino, has energy; therefore it has mass; therefore it is matter.
Radiation does not require matter.
they require a substance to use to make the 3 states of matter with.
Electron Magnetic Waves will propagate in the absence of matter
Radiation, or electromagnetic waves do not require matter to carry energy.
heat transfer
Friction
Electromagnetic Waves
heat energy
Radiation is a form of heat transfer that does not require matter as a medium. Energy is transferred through electromagnetic waves, such as from the sun to the Earth.
no it doesn't, only conduction and convection
That's a matter of opinion
Electromagnetic waves