Why does a pot of water start to steam after it boils? A. Convection currents moves the existing thermal energy around in the pot until the water molecules have enough potential energy to change phase.
B. Convection currents transfers thermal energy from the pot to the water. Then the water molecules start moving closer together which allows steam to be visible.
C. The thermal energy decreases the kinetic energy of the water molecules until it reaches the point it can condense into steam.
D. The thermal energy increases the particle motion of the water molecules until it reaches boiling point. Then the added thermal energy changes the liquid water into gaseous water.