Conduction. Any material that easily allows heat to move through it. Vacuum. A region of space that contains no matter. Solid.
Gas has no certain shape However, its Volume can change with Differences in Heat and Pressure.
Answer:
Conduction occurs when two objects at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature. ... It is caused by the increased activity or speed of molecules in a substance, which in turn causes temperature to rise accordingly. This process continues until heat energy from the warmer object spreads throughout the cooler object.
Explanation:
In longitudinal waves, the motion of the particles in a medium is across the direction of the wave.