Major #2 Review

A beaker contains a mixture of salt, sand, gravel, and iron fillings. Which substance is soluble in water

• salt

• sand

• iron filings

• gravel

When seperating a special mixture of salt water, what physical property are you using?

• density

• solubility

• evaporation

• magnetism

Which part of a circuit is the energy source?

• wire

• bulb

• battery

• switch

Which of the following shows a complete path?

• a

• b

• c

• d

A campfire, fireworks, and a burning candle all produce ---

• mechanical and thermal energy

• light and sound energy

• light and thermal energy

• sound and electrical energy

A student makes a solution by mixing a flavored, powdered drink mix into water. Some physical properties of water will change after the drink mix dissolves. Which physical property of the water will remain the same?

• odor

• taste

• color

• temperature

Carlton 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 Carlton'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 to 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

Water floats on corn syrup and sinks in oil. Which correctly classifies the relative density of water?

• Water is less dense than oil

• Water is more dense than oil

• water is the same density as corn syrup

• water is more dense than corn syrup

Based on the table, which material should be used to insulate electrical wires?

• a. Copper, because it is a good conductor of electricity

• b. Copper, because it is flexible and can be bent easily

• c. Plastic, because it is a solid

• d. Plastic, because it is a thermal and electrical insulator

Based on their properties, which of these tables properly identifies the objects?

• a.

• b

• c

• d