Solids, Liquids, and Gases

States of Matter

2

This state of matter has particles that vibrate in place in a fixed arrangement.

Solid

2

Which state of matter has particles that are close together, but move freely past one another?

Liquid

2

This state of matter has indefinite shape and indefinite volume, and the particles move freely and rapidly.

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 in a solid make small movements called...

Vibrations

Changes in State

2

A change from one state of matter to another.

Phase change

2

A change in state from a solid to a liquid.

Melting

2

A change in state from a liquid to a gas.

Vaporization/Evaporation

2

A change in state from a liquid to a solid.

Freezing

2

A change in state from a gas to a liquid.

Condensation

Vocabulary

2

The most basic unit of matter

Atom

2

The force of the outward push of a gas over an area of the walls of the container.

Pressure

2

A measure of the average kinetic energy of an object's particles.

Temperature

2

The temperature at which a liquid turns into a gas.

Boiling point

2

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

Deposition

Energy

2

What causes the particles in a gas to spread far apart?

Kinetic Energy

2

The total kinetic and potential energy of particles

Thermal Energy

2

Which temperature scale is based on the freezing and boiling points of water?

Celsius

2

A change in ______________________ energy causes a phase change in matter.

Thermal

2

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

Sublimation

Miscellaneous

2

What happens to the pressure of a gas when its temperature increases (at a constant volume)?

The pressure increases

2

What causes gas particles to exert pressure on the walls of a container?

Their collisions

2

What is the freezing point of water?

0^o C

2

Why does water boil at a lower temperature in Denver than it does at sea level?

Denver has lower atmospheric pressure.

2

A puddle slowly disappearing on a sunny day is an example of what change of state?

Evaporation