Physical Properties & Mixtures/Solutions

What term is used to identify a mixture that has the same composition throughout?

• gas
• liquid
• solvent
• solution

At room temperature helium does not have a definite shape or volume.  Which state is it in?

• gas
• solid
• water
• liquid

Elise wants to classify matter based on a physical property.  Using the tool shown, how could she classify objects?

• by mass
• by volume
• by relative density
• by temperature

Tony places liquids in a graduated cylinder.  Which liquid has the greatest relative density?

• lamp oil
• vegetable oil
• karo srup
• honey

Justin is making a solution using salt and water.  How will the physical properties of the salt change when is dissolves?

• It will change into a gas.
• It will melt.
• It will have a greater mass than before.
• It will no longer appear as separate grains.

Chase made a mixture of iron filings and sand.  Which provides evidence that the ingredients of this mixture maintain their physical properties?

• A magnet will separate the mixture.
• A liquid forms when the mixture is made.
• The temperature of the mixture decreases.
• The iron filings seem to disappear when the mixture is made.

Which property determines whether one substance will sink or float in another substance?

• texture
• relative density
• volume
• temperature

Carl adds salt to water.  He says that the salt must have become a different substance because it disappeared.  Which of the following could you do to support or contradict Carl's claim?

• Add the same amount of salt to different amounts of water to see if it happens again.
• Add different amounts of salt to the same amount of water and see if it disappears.
• Let the water evaporate to show that the salt is still present.
• Heat the salt water to see if it boils.

Which of the following describes a difference between solids, liquids, and gases?

• Temperatures change a solid to a liquid, but cannot change a liquid to a solid.
• Solids have definite volume, and liquids do not have a definite volume.
• The particles in a solid are much closer together that the particles in a gas.
• Solids take on the shape of their containers, and liquids maintain their own shapes.

Which type of matter is classified as a conductor of thermal energy?

• metal
• wood
• cotton
• plastic