Las fases cambiantes de la materia: cambio de fase sólida a líquida

The video tutorial explains phase changes, focusing on the transition from solid to liquid, using an ice cube as an example. It describes how energy affects phase changes and defines the melting point. The melting points of water and salt are compared, and the process of freezing is explained, highlighting the removal of heat and particle movement.

What happens to an ice cube when it is left on a warm window sill?

• It turns into a solid.

• It changes from a solid to a liquid.

• It remains unchanged.

• It turns into a gas.

What is the term for the temperature at which a substance changes from solid to liquid?

• Condensation point

• Boiling point

• Freezing point

• Melting point

At what temperature does water melt?

• 32° Celsius

• 0° Celsius

• 100° Celsius

• 801° Celsius

What is the process called when a liquid turns into a solid?

• Melting

• Evaporation

• Freezing

• Sublimation

What happens to the particles of a substance during freezing?

• They move faster and spread apart.

• They change into a gas.

• They move slower and lock into place.

• They evaporate into the air.