Exploring the Fourth State of Matter

What determines the shape and volume of a gas?

• The temperature of the environment

• The type of gas

• The container it is in

• The pressure it is under

How do particles in a liquid move?

• They do not move

• In fixed positions

• Randomly but within limited space

• In straight lines

What process describes the direct transition from solid to gas?

• Condensation

• Melting

• Sublimation

• Boiling

Which state change involves a liquid becoming a gas?

• Sublimation

• Boiling

• Freezing

• Condensation

What is plasma primarily composed of?

• Solid particles

• Neutral atoms

• Only negative ions

• Positive ions and unbound electrons

How can plasma be produced?

• By energizing a gas to lose electrons

• By compressing a gas

• By condensing a gas

• By freezing a gas

Which example is NOT a form of plasma?

• Fluorescent lights

• A burning candle

• The Sun

• A neon sign

What percentage of the universe's matter is in the plasma state?

• About 50%

• Less than 10%

• Over 99%

• Exactly 75%