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1 chem I unit test review Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 1. A term used to describe anything that has mass and takes up space is matter. _ 2. Most of the substances you see and use in everyday life are pure substances. _ 3. Substances containing two or more different elements chemically joined are called mixtures. _ 4. The smallest particle of the element oxygen that retains the chemical identity of that element is a(n) molecule. _ 5. The small dots pictured in the container below represent molecules of a substance. The substance is in the solid phase. _ 6. Compared to the melting point of a solid, the freezing point is the same. _ 7. A solid s ability to be pounded into thin sheets is called malleability. _ 8. A solid that may be stretched or bent and return to its original size and shape demonstrates ductility. _ 9. Properties of materials that may be observed directly are referred to as physical properties. _ 10. The measure of a solid's ability to be stretched and then returned to its original size is called tensile strength. _ 11. The increase in volume that a solid experiences as it is heated is known as thermal expansion. _ 12. A solid with an orderly, repeating arrangement of particles may be called a(n) amorphous solid. _ 13. The component of a solution that is present in the greatest amount is called the solute. _ 14. A solution that is the same throughout would be considered heterogeneous. _

2 Completion Select the correct term to complete each sentence. There are extra terms in the list. homogeneous heterogeneous pure substance mixture evaporation absolute zero more less melting point solid liquid gas boiling point Celsius Fahrenheit 15. A certain brand of cough syrup contains caramel, citric acid, FD&C red #40, flavoring, glucose, glycerine, high fructose corn syrup, purified water, saccharin sodium and sodium benzoate. It is considered to be a. 16. Matter that cannot be separated into other types of matter by physical means would be called a(n). 17. A mixture in which different samples are not necessarily made up of exactly the same proportions of matter is a mixture. 18. A mixture that contains more than one type of matter and is the same throughout is a mixture. 19. The phases of matter which flow are both and. 20. The temperature at which a solid changes to a liquid is called the. 21. The cooling process that changes a liquid to a gas is called. 22. Most materials are dense in their solid phase than in their liquid phase. Select the correct term to complete each sentence. There are extra terms in the list. physical chemical motion more less density weight buoyancy mass Bernoulli s Archimedes ductility tensile strength crystalline amorphous pascal psi streamlines brittleness malleability pressure 23. Properties that can be observed only when one substance is changed into another are called properties. 24. The ratio of mass to volume is known as. 25. Most materials are (more/less) dense in their solid phase than in their liquid phase. Water is a notable exception since solid ice is (more/less) dense than liquid water. 26. A solid whose particles are arranged in a random way is said to a(n) solid. 27. A measure of the stress due to pulling or tension that a material can withstand before breaking is called. 28. The tendency of a solid to break or crack when a force is applied is called.

3 Select the correct term to complete each sentence. There are extra terms in the list. insoluble dissolved hydronium alloy supersaturated saturated lone pairs soluble solubility greater than less than equal to dissociation solubility rules hydroxide 29. When solute particles are evenly distributed throughout the solvent, the solute is described as being. 30. The amount of solute that will dissolve in a certain volume of solvent is called. 31. If a solute will not dissolve in a particular solvent, for that solvent the solute is considered. 32. At 25 C, 40 grams of table salt is added to 100 ml of water in a test tube. After the solution has been shaken, some of the salt remains on the bottom of the test tube and will not dissolve because the solution is. 33. When a solvent contains more dissolved solute than it will hold under normal conditions, the solution is considered to be _. 34. Matter that always has exactly the same composition is classified as a(an). 35. Pure substances are either or. 36. An element has a fixed composition because it contains only one type of. 37. The substances in a(an) mixture are evenly distributed throughout the mixture. 38. In a(an) mixture, the parts of the mixture are noticeably different from one another. 39. Fresh milk is a suspension, but homogenized milk is a(an). 40. If the particles in a mixture scatter light, the mixture is either a(an) or a(an). Figure Based on the information in Figure 2-1, the point of nitrogen is 210.0ºC and the point of nitrogen is 195.8ºC. 42. A(An) change occurs when a material changes shape or size but the composition of the material does not change.

4 43. properties can be observed only when the substances in a sample of matter are changing into different substances. 44. When a metal changes color because it has been heated, a(an) change occurred. When a metal changes color because it has reacted with another substance, a(an) change occurred. 45. A(an) has a definite volume and a definite shape. 46. Materials can be classified as solids, liquids, or gases based on whether their shapes and are definite or variable. 47. The shape of a material remains constant when it is moved from one container to another. This material is a(an). 48. The phase change that is the reverse of deposition is. 49. Evaporation is the process that changes a substance from a liquid to a gas at temperatures below the substance s point. 50. During a(an) change, the system releases energy to its surroundings. 51. When sugar dissolves in water, water is the and sugar is the. 52. Table salt is soluble in cold water than it is in hot water.

5 chem I unit test review Answer Section MODIFIED TRUE/FALSE 1. ANS: T REF: section ANS: F, mixtures REF: section ANS: F, compounds REF: section ANS: F, atom REF: section ANS: F, gas REF: section ANS: T REF: section ANS: T REF: section ANS: F, elasticity REF: section ANS: T REF: section ANS: F, elasticity REF: section ANS: T REF: section ANS: F, crystalline REF: section ANS: F, solvent REF: section ANS: F, homogeneous REF: section 21.2 COMPLETION 15. ANS: mixture REF: section ANS: pure substance REF: section ANS: heterogeneous REF: section ANS: homogeneous REF: section ANS: liquid, gas gas, liquid REF: section ANS: melting point REF: section ANS: evaporation REF: section ANS: more REF: section ANS: chemical REF: section ANS: density REF: section ANS: more, less REF: section ANS: amorphous REF: section ANS: tensile strength REF: section ANS: brittleness REF: section ANS: dissolved REF: section ANS: solubility REF: section ANS: insoluble REF: section ANS: saturated REF: section ANS: supersaturated REF: section 21.2

6 34. ANS: pure substance substance 35. ANS: elements, compounds 36. ANS: atom 37. ANS: homogeneous 38. ANS: heterogeneous 39. ANS: colloid 40. ANS: suspension, colloid 41. ANS: melting, boiling 42. ANS: physical 43. ANS: Chemical 44. ANS: physical, chemical 45. ANS: solid 46. ANS: volumes 47. ANS: solid 48. ANS: sublimation 49. ANS: boiling 50. ANS: exothermic 51. ANS: solvent, solute 52. ANS: less

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