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Chemistry Describing Matter and Physical and Chemical Changes

Chemistry Describing Matter and Physical and Chemical Changes. Which activity is an example of a chemical change?. sugar dissolving in water water evaporating in air lighting a match freezing water.

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Chemistry Describing Matter and Physical and Chemical Changes

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  1. Chemistry Describing Matter and Physical and Chemical Changes

  2. Which activity is an example of a chemical change? • sugar dissolving in water • water evaporating in air • lighting a match • freezing water

  3. Diamonds are sometimes used as the tips of drill bits. Which physical property of a diamond MOST likely makes it a good cutting tool? • its electrical properties • its thermal properties • its hardness • its density

  4. Which is an example of a chemical change? • heating a block of ice to form liquid water • heating a tungsten wire until it glows brightly • adding sugar crystals to water to form a clear, colorless liquid • passing an electric current through water to form hydrogen and oxygen

  5. 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? • The ice cube is in water. • The liquid is less dense than the ice. • The liquid is more dense than the ice. • The ice cube is colder than the liquid.

  6. Which of these is a chemical property of a material? • density • flammability • color • brittleness

  7. 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? • density • area • mass • volume

  8. 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 • physical change. • chemical change. • solute being dissolved. • new substance being formed.

  9. The light and dark circles in the pictures below represent different types of atoms. Which picture best represents a pure compound? 1. 2. • [IMAGE] • [IMAGE] • [IMAGE] • [IMAGE] 3. 4.

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