<P> One example of deposition is the process by which , in sub-freezing air , water vapor changes directly to ice without first becoming a liquid . This is how snow forms in clouds , as well as how frost and hoar frost form on the ground or other surfaces . Another example is when frost forms on a leaf . For deposition to occur , thermal energy must be removed from a gas . When the air becomes cold enough , water vapor in the air surrounding the leaf loses enough thermal energy to change into a solid . Even though the air temperature may be below the dew point , the water vapor may not be able to condense spontaneously if there is no way to remove the latent heat . When the leaf is introduced , the supercooled water vapor immediately begins to condense , but by this point is already past the freezing point . This causes the water vapor to change directly into a solid . </P>
<P> One example of deposition is the process by which , in sub-freezing air , water vapor changes directly to ice without first becoming a liquid . This is how snow forms in clouds , as well as how frost and hoar frost form on the ground or other surfaces . Another example is when frost forms on a leaf . For deposition to occur , thermal energy must be removed from a gas . When the air becomes cold enough , water vapor in the air surrounding the leaf loses enough thermal energy to change into a solid . Even though the air temperature may be below the dew point , the water vapor may not be able to condense spontaneously if there is no way to remove the latent heat . When the leaf is introduced , the supercooled water vapor immediately begins to condense , but by this point is already past the freezing point . This causes the water vapor to change directly into a solid . </P>
water vapor turning to frost is an example of
water vapor turning to frost is an example of
deposition
deposition