Lesson 4: Phase Changes Review

The States of Matter

2

This state of matter has definite shape and definite volume.

Solid

2

This state of matter has indefinite shape and definite volume

Liquid

2

This state of matter has indefinite shape and indefinite volume.

Gas

2

True or False: Water takes up more space as a liquid than it does as a solid.

False - Water takes up more space as a solid.

2

The particles of a solid make small movements called...

Vibrations

Energy

2

A type of energy change in which energy is added.

Endothermic

2

A type of energy change in which energy is removed.

Exothermic

2

Melting, evaporation, and sublimation are ______________ changes.

Endothermic

2

Freezing and condensation are _________________ changes.

Exothermic

2

Thermal energy can be ________________ from one object to another.

Transferred

Changes of State

2

The process of changing from a solid to a liquid.

Melting

2

The process of changing from a liquid to a solid.

Freezing

2

The temperature at which a substance changes from a gas to a liquid.

Condensation point

2

The process in which a substance changes from a solid, skips the liquid phase, and becomes a gas.

Sublimation

2

True or False: A change of state is a chemical change.

False

Vocabulary

2

A measure of how fast the particles in an object are moving.

Temperature

2

Energy associated with moving objects.

Kinetic energy

2

A form of kinetic energy associated with molecules in motion; also known as "heat."

Thermal energy

2

The temperature at which a liquid turns into a gas.

Boiling point

2

The change of matter from one state to another, such as a solid, liquid, or gas.

Phase change or Change of state

Miscellaneous

2

Two things that can happen to a substance when it gains or loses energy (name both)

Temperature changes and Change of state

2

This law says that heat flows naturally from an object at a higher temperature to an object at a lower temperature.

The Second Law of Thermodynamics

2

This law states that matter cannot be created nor destroyed.

The Law of Conservation of Mass

2

The process by which a substance changes directly from a gas to a solid, skipping the liquid phase.

Deposition

2

True or False: Particles of a substance begin to move slower at higher temperatures

False: Particles begin to move faster at higher temperatures.