Cambios de estado – ¿Sabías que?

Steam is an invisible gas, and water vapor becomes visible when it cools and condenses into droplets, forming a white mist. The air always contains some water vapor, and clouds form when large amounts of this vapor condense into visible water droplets.

What is steam primarily composed of?

• Visible mist

• Liquid water

• Invisible gas

• Solid ice

When does water vapor become visible?

• When it condenses into droplets

• When it evaporates

• When it freezes

• When it boils

What does the air always contain a little of?

• Dust particles

• Water vapor

• Oxygen

• Carbon dioxide

How do clouds form?

• By the melting of ice

• By the evaporation of water

• By the freezing of water

• By the condensation of water vapor into droplets

What happens to water vapor in the air to make it visible?

• It solidifies

• It sublimates

• It condenses

• It evaporates