Unit 2: States of Matter and Changes of State

Front

What is deposition in the context of states of matter?

Back

Deposition is the process where water vapor changes directly from a gas to a solid, such as ice, without becoming a liquid first.

Front

How do particles behave before and after deposition?

Back

Before deposition, the particles move quickly in all directions; after deposition, they vibrate in place.

Front

What is atmospheric pressure?

Back

Atmospheric pressure is the force exerted by the weight of air above a surface, which decreases with altitude.

Front

How does atmospheric pressure change with altitude?

Back

As altitude increases, atmospheric pressure decreases.

Front

What is evaporation?

Back

Evaporation is the process of vaporization that occurs only on the surface of a liquid.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at the surface of a liquid at any temperature, while boiling occurs throughout the liquid at a specific temperature.

Front

What is sublimation?

Back

Sublimation is the process where a solid turns directly into a gas without becoming a liquid.

Front

Can you give an example of sublimation?

Back

Dry ice (solid carbon dioxide) sublimates directly into carbon dioxide gas.

Front

What happens to water when it freezes?

Back

When water freezes, it changes from a liquid to a solid state, with particles vibrating in fixed positions.

Front

What is melting?

Back

Melting is the process where a solid turns into a liquid when heat is applied.