The Changing Phases of Matter: Solid to Liquid Phase Change

The video explains phase changes, focusing on melting and freezing. It describes how energy affects matter's state, with examples like ice melting on a warm windowsill. The melting point of water and salt is discussed, along with the freezing process where heat is removed, causing particles to slow and solidify.

What is a phase change?

• A change in the state of matter

• A change in temperature

• A change in color

• A change in size

What happens when enough energy is added to a solid?

• It condenses

• It evaporates

• It melts

• It freezes

At what temperature does water melt?

• 32 degrees Celsius

• 801 degrees Celsius

• 0 degrees Celsius

• 100 degrees Celsius

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

• Freezing

• Melting

• Boiling

• Sublimation

What happens to particles during freezing?

• They move slower and lock into place

• They evaporate

• They move faster

• They change color