Question

which of the following words is the correct option for fill in the blank conduction, convection, radiation? occurs when particles of warmer matter collide with particles of cooler matter.

Explanation:

Conduction is the transfer of heat through direct contact between particles. When warmer particles collide with cooler ones (direct contact), heat is transferred. Convection involves the movement of fluids (liquids or gases) due to density differences. Radiation is the transfer of heat in the form of electromagnetic waves (no medium - particles are not in direct contact for heat transfer in the sense of particle - to - particle collision).

Answer:

conduction