1. Matter that always has exactly the same composition is A) a heterogeneous mixture. B) a homogeneous mixture. C) a solution. D) a pure substance.

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2. A mixture with parts that are so evenly distributed that it is difficult to distinguish one substance from another is a A) colloid. B) homogeneous mixture. C) suspension. D) compound.

3. In which step of the scientific method is information obtained through the senses? A) revising a hypothesis B) making observations C) analyzing data D) drawing conclusions

4. A substance that cannot be broken down into simpler substances is A) a compound. B) a solution. C) an element. D) a mixture.

5. Which of the statements is true about scientific theories? A) Theories never change. B) Theories become hypotheses. C) Theories are never proven. D) Theories become scientific laws.

6. Two examples of pure substances are A) copper and soda. B) air and water. C) tap water and oxygen. D) aluminum and table salt.

7. How is 0.545 written in scientific notation? A) 545 x 10 -3 B) 5.45 x 10 1 C) 5.45 x 10 -1 D) 545 x 10 3

8. What are 5 meters equal to? A) 500 millimeters B) 500 centimeters C) 500 kilometers D) 500 decimeters

9. A statement that summarizes a pattern found in nature is a A) scientific method. B) theory. C) hypothesis. D) scientific law.

10.On the Celsius scale, at what temperature does water boil? A) 100° B) 0° C) 10° D) 1000°

11. If a substance must be shaken before use it would most likely be A) a compound. B) an element. C) a suspension. D) a colloid.

12. The graph of data with a direct proportion would be A) a curved line. B) a straight line. C) a jagged line. D) a circle.

13. According to the line graph, which of the following statements is false. A) The unit for the slope of the line is cm/s. B) The slope of the line represents speed. C) The graph shows a direct proportion between distance and time. (D) At 0.1 second, the distance is approximately 10 cm. Speed of a Ball Time (s) Distance (cm )

14. Which of the following is a false statement. A) The particles of a solution are the smallest of heterogeneous mixtures. B) The particles of a suspension settle out over time. C) The particles of a colloid settle out over time. D) The size of the particles of a colloid are between the size of those found in solutions and suspensions.

15. Which of the following is a compound? A) Si B) KI C) Bi D) Li

16. Sand is an example of a A) compound. B) homogeneous mixture. C) solution. D) heterogeneous mixture.

17. The symbol for silver is A) Ag B) AG C) ag

18. Coffee is an example of A) an element. B) a compound. C) a homogeneous mixture. D) a colloid.

19. Which of the following is an example of a homogeneous mixture? A) H 2 O B) tap water C) gold D) a can of mixed nuts

20. According to the table, nitrogen would be a liquid at A) -215°C B) -194°C C) -196°C

21. All are physical properties except A) hardness. B) viscosity. C) density. D) reactivity.

22. The type of change in which the composition of the material changes chemically is a A) physical change. B) chemical change.

23. Which of the following is not evidence that a chemical change may have occurred? A) formation of a precipitate B) change of shape C) formation of a gas D) change of color

A) glass. B) putty. C) iron. D) plastic. 24. A solid has a high melting point, is hard and malleable is most likely to be

25. Since both have particles small enough to pass through paper, the method used to separate two liquids is A) distillation. B) filtration.

26. A material’s resistance to flow is A) conductivity. B) viscosity. C) hardness. D)malleability.

27. Which of the following is not a true statement? A) A solid is a substance with a definite shape. B) A solid is a substance with a definite volume. C) The particles of a solid are packed tightly together. D) The particles of a solid are randomly arranged.

28. Which of the following is not a true statement? A) Liquids have no definite shape. B) Liquids can be compressed. C) The particles of liquids are randomly arranged. D) Liquids take the shape of their container.

29. Which of the following is not a true statement? A) A gas takes the shape of its container. B) A gas cannot be compressed. C) There is a lot of space between the particle of a gas. D) A gas has no definite volume.

30. Which of the statements is true? A) Gases make up 99% of the matter in the universe. B) Plasmas form as a result of low frequency electricity. C) Bose-Einstein condensates form under extremely low temperatures. D) Plasmas are only found in our sun.

31. In which state of matter is the energy that binds the particles so weak that it can be ignored under normal circumstances? A) BEC B) solid C) liquid D) gas

32. The pressure of a gas will increase when the temperature is increased if the volume of the gas A) and number of particles are increased. B) is increased but the number of particles is constant. C) and the number of particles are constant. D) is constant but the number of particles is reduced.

33. Which of the following factors affects the pressure of an enclosed gas? A) number of particles B) pressure C) temperature D) All of the above.

34.You want to increase the pressure in a tire. Which of the following will not increase the pressure? Assume all factors not mentioned remain constant. A) Increase the volume of the container. B) Increase the amount of particles in the container. C) Increase the temperature of the gas.

35. The pressure of a 100 liter container of gas is 10 kPa. The volume is decreased to 50 liters. What is the pressure? P 2 = A) 50 kPa B) 10 kPa C) 20 kPa D) 5 kPa

36. The temperature of a 70 ml container of gas is 15°C. If the volume of the container increases to 140 ml, what does the temperature become? A) 60°C B) 30°C C) 6.4°C D) 7.5°C T 2 =

37. All of the following are exothermic phase changes except A) freezing. B) sublimation. C) deposition. D) condensation.

37. The phase change in which a solid goes directly to a gas without turning into a liquid first is A) deposition. B) condensation. C) sublimation D) vaporization.

38. The amount of energy needed to change a solid to a liquid is A) heat of vaporization. B) heat of fusion.

39. During a phase change, the temperature of a substance A) increases. B) remains the same. C) decreases. D) doubles.

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1. Matter that always has exactly the same composition is A) a heterogeneous mixture. B) a homogeneous mixture. C) a solution. D) a pure substance.

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1. Matter that always has exactly the same composition is A) a heterogeneous mixture. B) a homogeneous mixture. C) a solution. D) a pure substance.

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Presentation on theme: "1. Matter that always has exactly the same composition is A) a heterogeneous mixture. B) a homogeneous mixture. C) a solution. D) a pure substance."— Presentation transcript:

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