Matter Unit Test Review

In lemonade, what is the substance that is dissolved?

• Solvent
• Solute

Which of the following is a physical property?

• Boiling point
• Acidity

During a chemical change, the material becomes something new and different.

• True
• False

Which change happens during the sublimation process?

• gas to solid
• solid to gas

At what temperature does water start to evaporate?

• 0 C
• 100 C

An ice cube is placed in a pan and heated on a stove until it melts and then evaporates. Which best explains the change that occurred?

• The heat decreased the movement of the water molecules causing a change in state.
• The heat increased the movement of the water molecules causing a change in state.

What is the density of any pure substance?

• the amount of mass per volume
• the total mass per weight

A 100-gram sample of lead has a melting point of 621.5°F. If 50 grams were removed, why would the remaining sample not have a melting point of 310.75°F?

• The melting point of a pure substance is dependent on the amount present.
• The melting point of a pure substance is independent of the amount present.

What is the process called when a gas turns directly into a solid without going through the liquid phase?

• Condensation
• Deposition

What happens to steam during condensation?

• It loses energy and changes to a liquid.
• It loses energy and changes to a gas.