Properties of Matter

Which of the following best describes the movement of particles in a gas?

• The particles are close together

• The particle of a gas move freely past one another

• The particles of a gas are attracted to one another

• The particles of a solid vibrate but do not move past one another

What is the most important difference between the physical change and chemical change of wax in a burning candle?

• The burning of wax forms new substances with different properties, while the melting of wax does not.

• Melted wax can be separated into other substances, while solid wax canno

• A higher temperature is needed to burn wax than to melt wax.

• Melted wax is a different phase of matter than solid wax

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The density of gold at room temperature is 19.3 g/cm3 , and the density of gold at its melting point is 17.31 g/cm3 . What does this information indicate about the differences between solid gold and liquid gold?

• The particles in solid gold have more energy than those in liquid gold

• The particles in solid gold have more mass than those in liquid gold.

• When solid gold melts, some of its particles evaporate.

• When solid gold melts, its particles move farther apart.

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Which of the following describes a chemical change?

• steam loses heat when condensing

• ice goes from solid to liquid when melting

• water goes from liquid to gas when boiling

• gray iron turns reddish-brown when rusting

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Copper and other metals are often used in making pots and pans to cook in. What property would best explain why?

• conductivity because it is a chemical property

• conductivity because it is a physical property

• insulation because it is a chemical property

• insulation because it is a physical property

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Choose the best description below for the image

• Physical Change

• Chemical Change

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Which of the following is a physical property?

• density of water

• vinegar has a sour odor (smell)

• 
  zinc fizzes when placed in acid

• magnesium is very flammable

Which of the following describes the difference between the motion of liquid water and water vapor?

• The particles in the liquid do not move, but the particles in a gas can move back and forth.

• The motion of the particles is the same in both states, but they move slower in the gas state

• The particles in a gas can slide past each other, while the particles in a liquid are locked in place

• The particles in a liquid can slide past each other, while the particles in a gas are free to move in all directions.

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A copper penny turning greenish after a few years is an example of ...

• Chemical Change

• Physical Change

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Is glass breaking a chemical or physical change?

• Chemical Change

• Physical Change