The video explains the process of sublimation, where solids turn directly into gas without becoming liquid. This phenomenon is observed in cold climates where snow disappears despite freezing temperatures. Another example is dry ice, which is solid carbon dioxide that sublimates at room temperature.

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

• Evaporation

• Condensation

• Sublimation

• Melting

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

• Plasma

• Liquid

• Solid

• None

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?

• Solid oxygen

• Solid nitrogen

• Solid carbon dioxide

• Solid hydrogen

At what temperature does dry ice sublimate?

• Above boiling

• Room temperature

• At absolute zero

• Below freezing