Name: Period: (A) UNIT 1 TEST: MATTER. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
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1 UNIT 1 TEST: MATTER Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Which of the following is NOT a pure substance? a. b. c. d. 2. The following chemical equation shows that HCl acid can be broken down into its individual components through chemical means. 2HCl H 2 + Cl 2 HCl is classified asa. element c. mixture b. solution d. compound 3. Which beaker illustrated below best represents a homogeneous mixture? a. c. b. d. 4. Which of the following is NOT a sign that a chemical reaction has taken place? a. Formation of a solid c. Formation of a gas b. Color change d. Melting 5. Matter includes all of the following EXCEPT a. air. c. smoke. b. light. d. water vapor. 1
2 6. The first diagram represents four molecules of a substance before any change has occurred. Which diagram best represents the same substance after a physical change has occurred? a. A c. C b. B d. D 7. Which description of the states of matter is accurate? a. Only gases have an indefinite shape. c. Gases have an indefinite shape and a definite volume. b. Liquids have a definite volume and a definite shape. d. Solids have a definite shape and a definite volume. 8. A sample of water taken from a local lake (where floating particles are present) would be best described as a. a. homogeneous mixture. c. pure substance. b. heterogeneous mixture. d. compound. 9. Which statement describes a chemical property? a. Its crystals are a metallic gray. c. It boils at 273K. b. It dissolves in alcohol. d. It reacts with carbon to form a gas. 10. If a substance can t be broken down physically but it CAN be broken down chemically, it is classified as a. a. element c. compound b. heterogeneous mixture d. homogeneous mixture 11. The unit cm 3 measures a. length. c. volume. b. mass. d. density. 2
3 12. A student makes a list of some observable properties of a substance. Students List of Properties 1) silver in color 2) shiny 3) conducts electricity 4) forms a compound with sulfur Which of the student s listed properties is a chemical property of the substance? a. 1 c. 3 b. 2 d Four watch glasses, labeled 1, 2, 3, and 4, each held a few crystals of four different white solid substances. Equal numbers of drops of a dilute acid were added to each of the dishes. Nothing else was done to the containers. The results are listed in the given table. Which of these MOST likely reflects a physical change? a. 1 c. 3 b. 2 d The mass of matter per unit volume is a. mass. c. inertia. b. weight. d. density. True/False Indicate whether the sentence or statement is true or false Gases are more compressible than liquids or solids. Solids take the shape of their container, but maintain constant volume. Burning wood is a chemical change. Water is an element. Short Answer 19. Matter can have a definite or indefinite shape and volume depending upon the state of matter. A liquid has shape and volume. 3
4 20. Choose one of the following physical or chemical changes and circle it. Say whether it is a physical or chemical change and then explain why. a. Baking a cake c. A nail rusting b. Melting a popsicle d. Water condensing on a cold glass Physical or Chemical change: Why? 21. A block of aluminum occupies a volume of 15.0 ml and weighs 40.5 g. What is its density? 22. What is the mass of the ethyl alcohol that exactly fills a ml container? The density of ethyl alcohol is g/ml. 23. Draw a representation of the particles in a solid, liquid and a gas. 24. What is one question you thought would be on this test but wasn t? How would you have answered that question? 4
5 EXTRA CREDIT: Draw a particle diagram of a pure element and a homogeneous mixture: 5
6 UNIT 1 TEST: MATTER Answer Section MULTIPLE CHOICE 1. ANS: B PTS: 1 2. ANS: D PTS: 1 3. ANS: A PTS: 1 4. ANS: D PTS: 1 5. ANS: B PTS: 1 6. ANS: A PTS: 1 7. ANS: D PTS: 1 8. ANS: B PTS: 1 9. ANS: D PTS: ANS: C PTS: ANS: C PTS: ANS: D PTS: ANS: C PTS: ANS: D PTS: 1 TRUE/FALSE 15. ANS: T PTS: ANS: F PTS: ANS: T PTS: ANS: F PTS: 1 SHORT ANSWER 19. ANS: indefinite, definite (must be in that order) 6
7 PTS: ANS: a. Chemical change a new substance is being created b. Physical change state change from a solid to a liquid c. Chemical change a new substance is being created d. Physical change state change from a gas to a liquid PTS: g/ml 23. ANS: g solid close together, liquid more spread out, gas far apart PTS: ANS: Anything PTS: 0 7
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