PhasesOfMatterPreTest

Which are characteristic properties?

• a.) density
• b.) freezing point
• c.) boiling point
• d.) all of the above

Which is NOT a characteristic property?

• a.) volume
• b.) freezing point
• c.) boiling point
• d.) density

______ is useful in identifying unknown substances

• Mass
• Volume
• Characteristic Properties

The reason you can see your breath in the winter is because as you breathe out the atoms cool down and…

• a.) become more dense, and melt into a liquid
• b.) become more dense, and condense into a liquid
• c.) become less dense and freeze into a gas.
• d.) become less dense, and evaporate into a gas

Which statement below is true?

• a.) In gases the atoms are spread apart the most.
• b.) In liquids the atoms are packed closer compared to gases.
• c.) In solids the atoms are packed the closest together.
• d.) All the above statements are correct.
• e.) All the above statements are wrong.

What phase change occurs when a substance turns from a solid to a liquid?

• a.) condensing
• b.) evaporating
• c.) freezing
• d.) melting

What phase change occurs when a substance turns from a liquid to a gas?

• a.) condensing
• b.) evaporating
• c.) freezing
• d.) melting

What phase change occurs when a substance turns from a gas to a liquid?

• a.) condensing
• b.) evaporating
• c.) freezing
• d.) melting

What phase change occurs when a substance turns from a liquid to solid?

• a.) condensing
• b.) evaporating
• c.) freezing
• d.) melting

What part of a cooling or heating curve indicates a phase change?

• a.) the steepest part of the graph (greatest slope)
• b.) the plateau (flat part)
• c.) the highest temperature
• d.) the lowest temperature