Topic 2.1 Basic Concepts of Matter

The process where solid changes into gas is called

• Deposition

• Condensation

• Sublimation

• Freezing

The process where gas changes into liquid is called

• Sublimation

• Boiling

• Deposition

• Condensation

Which process involved heat energy being absorbed from surroundings?

• Deposition

• Melting

• Sublimation

• Condensation

Which process involved heat energy being released to surroundings?

• Boiling

• Condensation

• Sublimation

• Freezing

What do you understand about the melting point?

• A point at which solid changes to gas

• The constant temperature at which a solid changes to gas

• A point at which solid changes to liquid

• The constant temperature at which a solid changes to liquid

How energy causes a liquid change to gas?

• Heat energy is absorbed to overcome the attraction force between liquid particles.

• Heat energy is released when gas particles are formed.

• Heat energy is absorbed to overcome the attraction force between gas particles.

• Heat energy is released when liquid particles are formed.

Why solid A has a higher melting and boiling point than solid B?

• The force of attraction between particles in solid A is stronger than in solid B.

• The force of attraction between particles in solid A is weaker than in solid B.

• More heat energy is needed to overcome the forces of attraction in solid B.

• More heat energy is needed to overcome the forces of attraction in solid A.

• Heat the substance A until its temperature reaches 75.

• Heat the substance A until its temperature reaches 42.

• Heat the substance A until its temperature reaches 39.

• Heat the substance A until its temperature reaches 76.