Freeze

The video tutorial explains the concept of freezing, where a liquid turns into a solid due to cold temperatures. It discusses the freezing points of water and mercury, and how freezing affects rain and food. The opposite process, melting, is also covered. The video concludes with a question about the different freezing points of saltwater and freshwater.

What happens to a liquid when it reaches its freezing point?

• It becomes a gas.

• It evaporates.

• It remains unchanged.

• It becomes a solid.

Which of the following is an example of a liquid turning into a solid due to cold temperatures?

• Water boiling into steam.

• Rain turning into sleet.

• Ice cream melting.

• Bread becoming stale.

What is the opposite process of freezing?

• Melting

• Sublimation

• Evaporation

• Condensation

Why is ice cream kept in the freezer?

• To keep it solid.

• To make it melt faster.

• To make it taste better.

• To change its color.

What is a key difference between saltwater and freshwater in terms of freezing?

• Saltwater and freshwater freeze at different temperatures.

• They freeze at the same temperature.

• Freshwater freezes at a lower temperature.

• Saltwater freezes at a higher temperature.