Chemistry Describing Matter and Physical and Chemical

Changes

Which activity is an example of a chemical

change?

1. sugar dissolving in water

2. water evaporating in air

3. lighting a match4. freezing water

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Diamonds are sometimes used as the tips of drill

bits. Which physical property of a

diamond MOST likely makes it a good cutting

tool?1. its electrical

properties2. its thermal

properties3. its hardness4. its density 1 2 3 4

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Which is an example of a chemical change?

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1. heating a block of ice to form liquid water

2. heating a tungsten wire until it glows brightly

3. adding sugar crystals to water to form a clear, colorless liquid

4. passing an electric current through water to form hydrogen and oxygen

The diagram shows a tank of fluid with an ice cube at the

bottom.

Which best explains why the ice cube sank in the liquid?

1. The ice cube is in water.2. The liquid is less dense

than the ice.3. The liquid is more dense

than the ice.4. The ice cube is colder

than the liquid.1 2 3 4

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Which of these is a chemical property of a

material?

1. density2. flammability3. color4. brittleness

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Students added a small rock to a graduated cylinder with 16 mL of water. The water level rose 6 mL.

The student subtracted the two water levels. Which property of the rock were the students measuring?

1. density2. area3. mass4. volume

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John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water

had evaporated and salt was visible at the bottom of the jar. This in an

example of a

1. physical change.2. chemical change.3. solute being dissolved.4. new substance being

formed.1 2 3 4

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The light and dark circles in the pictures below represent

different types of atoms. Which picture best represents a pure

compound?1. [IMAGE]2. [IMAGE]3. [IMAGE]4. [IMAGE]

1. 2.

3. 4.

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