The video tutorial explains the phase change of vaporization, where a liquid turns into a gas. It covers evaporation, which occurs on the surface of a liquid, and boiling, where gas bubbles form within the liquid. The opposite process, condensation, is also discussed, highlighting how gas turns back into liquid, forming clouds and droplets on surfaces.

What is the process called when liquid water changes into water vapor on the surface?

• Freezing

• Evaporation

• Condensation

• Sublimation

Which of the following is a type of vaporization that occurs inside a liquid?

• Sublimation

• Boiling

• Condensation

• Evaporation

At what temperature does water boil under normal conditions at sea level?

• 150° Celsius

• 50° Celsius

• 0° Celsius

• 100° Celsius

What happens to gas particles during condensation?

• They lose energy and slow down

• They gain energy and speed up

• They split into smaller particles

• They remain unchanged

How do clouds form in the atmosphere?

• By the condensation of water vapor

• By the evaporation of water droplets

• By the freezing of water vapor

• By the sublimation of ice