States of Matter and Changes of State Quiz

What state is water typically found in at room temperature?

• Plasma

• Gas

• Liquid

• Solid

What is the process called when a solid turns into a liquid?

• Melting

• Freezing

• Sublimation

• Condensing

At what temperature does pure water boil?

• 0 degrees C

• 50 degrees C

• 150 degrees C

• 100 degrees C

What is the term for the direct change from solid to gas?

• Boiling

• Condensing

• Melting

• Sublimation

Why is it incorrect to call the change from liquid to gas 'evaporating' at boiling point?

• Evaporation occurs at lower temperatures

• Evaporation occurs at boiling point

• Evaporation requires a solid

• Evaporation is the same as boiling

What defines a pure substance in terms of boiling and melting points?

• They have no melting point

• They have exact boiling and melting points

• They have variable boiling points

• They have no boiling point

What is the boiling point of copper if it is a pure substance?

• 100 degrees C

• 1083 degrees C

• 2567 degrees C

• 0 degrees C

How can you determine if a substance is pure using a graph?

• By observing a vertical line

• By finding a diagonal line

• By checking for a flat horizontal line

• By looking for a wiggly line

What does a wiggly line on a heating curve indicate?

• A pure substance

• A mixture

• A solid state

• A gas state

What happens to the temperature of a pure substance during a change of state?

• It fluctuates

• It remains constant

• It increases

• It decreases