Question

sublimation is when a solid gains energy and becomes a gas, skipping the change to liquid. sublimation occurs when heat increases. it causes the particles to move so fast that they separate and become a gas. examples of sublimation include dry ice, freeze - drying, and mothballs. dry ice is solid carbon dioxide (co2) that does not melt into a liquid at room temperature. it sublimates into a gas. foods that are freeze - dried remove water from frozen foods without the water ever becoming liquid, going straight to water vapor. mothballs used to be made of a chemical called naphthalene, which sublimated at room temperature. this caused mothballs to decrease in size over time. what happens to the particles in a solid object when sublimation occurs? the particles line up uniformly. the particles move so fast that they change into a gas. the particles slow down.

Explanation:

The text on the left - hand side clearly states that sublimation occurs when heat increases, causing particles to move so fast that they separate and become a gas.

Answer:

The particles move so fast that they change into a gas.