Matter is a slightly archaic word for something with mass, as in the conservation of matter (which must be paired with the conservation of energy to still hold true. Mass can be converted back and forth between energy, so therefore so can matter. Of course relativistic mass is conserved as it's a function of the energy of an object in that reference frame.
I believe the answer would be through the movement of the molecules, the higher the temperature the more the molecules move around and vibrate.
Answer:
4
Explanation:
4.They are different states of the same pure substance
When it is acted upon by an outside force
