How does heat effect molecules?

When heat is added to something it causes the atoms to interact together faster, such as vibrating faster. This causes the space between the atoms to increase which in turn casues the substance to...

When heat touches air molecules they speed up but when cold air touches molecules they slow down.

if you mean the transfer rate of heat ?; the heat transfer rate depends on the atom or molecule type .

heat is just the transfer of energy from a point of high temperature to a point of lower temperature ex. if a sidewalk is hotter than your foot and you step on it, some of the heat from the sidewalk...

Heat is not a molecule, it's a form of energy. It is conducted from molecule to molecule in conduction and convection (not in heating by radiation). Molecules with high kinetic energy give their...