The Changing Phases of Matter: Solid to Gas Phase Change

The video tutorial explains the process of sublimation, where solids transition directly to gas without becoming liquid. It uses snow and dry ice as examples to illustrate how sublimation occurs even at temperatures below freezing. The tutorial highlights that sublimation involves surface particles gaining enough energy to become gas, bypassing the liquid state.

What is the process called when snow disappears even in freezing temperatures?

• Melting

• Sublimation

• Condensation

• Evaporation

During sublimation, what state does a solid skip when turning into a gas?

• Plasma

• Solid

• Liquid

• Vapor

Which of the following is an example of sublimation?

• Water boiling

• Ice melting

• Dry ice turning to gas

• Steam condensing

What is dry ice made of?

• Frozen water

• Liquid oxygen

• Solid nitrogen

• Solid carbon dioxide

What happens to dry ice at room temperature?

• It becomes plasma

• It melts into liquid

• It remains solid

• It turns into gas