ch01 - Chapter 1 Fundamental Concepts and Units of...

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Chapter 1 Fundamental Concepts and Units of Measurement Multiple Choice Section 1.2 1. A broad generalization based on the results of many experiments is called a. the scientific method. * b. a scientific law. c. a theory. d. a hypothesis. e. an empirical fact. Section 1.2 2. A tentative explanation used to explain observed facts or laws is called a. the scientific method. b. a scientific law. c. a theory. * d. a hypothesis. e. an empirical fact. Section 1.2 3. A scientific law is * a. a broad statement based on the results of many experiments. b. a tentative explanation for a set of observations that can be tested by further experimentation. c. a tested explanation that explains a body of facts related to behavior in nature. d. a model used to visualize the invisible. e. an undisputed explanation of a scientific principle to which no exception can be found. Section 1.3 4. Which one of the following does not involve a chemical change? a. A fish that is left for some time in an unrefrigerated place decomposes. b. Apple juice which is left in an open bottle ferments. c. A loaf of bread rises and its volume expands when it is baked in an oven. * d. When a lake starts to freeze in winter, ice is formed on the surface. e. When sugar is fermented under certain conditions, alcohol is produced. Section 1.3 5. Which one of the following is a physical change? a. When ignited with a match in open air, paper burns. * b. In cold weather, water condenses on the inside surface of single pane windows. c. When treated with bleach, some dyed fabrics change color. d. When heated strongly, sugar turns dark brown. 1
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Section 1.3 6. Which one of the following is a chemical change? * a. When blood is mixed with 3% hydrogen peroxide solution, it changes color. b. When water is boiled, it forms steam. c. When a solid stick of butter is heated, it becomes a liquid. d. When blue paint is mixed with yellow paint, a green color is obtained. e. When a bar of gold metal is pounded with a hammer, it flattens out. Section 1.3 7. Which of the following is not a chemical change? a. A nail rusts during a rainstorm. b. Milk turns sour if left unrefrigerated. c. Yeast produces carbon dioxide to help bread rise. d. Copper is molded with heat to form pipes. * e. Mixing baking soda and vinegar causes fizzing and bubbling. Section 1.3 8. An example of an element is a. glucose. b. table salt. * c. gold. d. rust. e. chalk. Section 1.3 9. The two types of pure substances are * a. compounds and elements. b. compounds and solutions. c. elements and mixtures. d. mixtures and solutions. e. solutions and elements. Section 1.3 10. An example of a chemical compound is a. gun metal. b. brass.
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This note was uploaded on 05/19/2010 for the course CHEM 211 taught by Professor Rellima during the Spring '08 term at Wichita State.

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ch01 - Chapter 1 Fundamental Concepts and Units of...

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