The phase change that changes a solid directly to a gas or vapor without going through a liquid phase is called sublimation.

Here are some examples of sublimation:

* Dry ice (solid carbon dioxide) sublimating into carbon dioxide gas. This is a common example you might see at a grocery store or in a science experiment.

* Mothballs slowly disappearing over time. Mothballs are often made of naphthalene or paradichlorobenzene, which sublime at room temperature.

* Frozen water (ice) sublimating in a cold, dry environment. This is how freeze-drying works.

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