Unit 2a test What is matter? Matching Part 1



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Unit 2a test - What is matter?

Matching Part 1

Match each item with the correct statement below.

a.

Mixture (#4)

d.

Vapor (#1)

b.

Product (#3)

e.

heterogeneous mixture (#5)

c.

Phase (#2)


1. gaseous state of substance that is a liquid or solid at room temperature
2. part of a sample having uniform composition and properties
3. a substance formed in a chemical reaction

4. a physical blend of two or more components


5. not uniform in compositio

nMatch each item with the correct statement below.

a.

Distillation (#10)

d.

Compound (#9)

b.

Mass (#6)

e.

homogeneous (#7)

c.

chemical reaction (#8)


6. amount of matter an object contains
7. describes mixture with a uniform composition
8. composed of two or more substances chemically combined in a fixed proportion
9. substance that cannot be changed into simpler substances by chemical means
10. a process in which a liquid is boiled to produce a vapor that is condensed again into a liquid


Multiple Choice (scroll down)

Identify the choice that best completes the statement or answers the question.

11. Which of the following is a chemical property?

aability to react with oxygen b. color c. freezing point d. hardness


12. What do chemical symbols and formulas represent?

a. atoms and mixtures b. compounds and mixtures celements and compounds d. elements and ions


13. Which state of matter has a definite volume and takes the shape of its container?

a. solid bliquid c. gas d. both b and c


14. Which of the following is a physical change?

a. rotting of food b. explosion c. corrosion d. evaporation


15. A substance that forms a vapor is generally in what physical state at room temperature?

a. liquid b. liquid or solid c. gas d. solid


16. Which state of matter expands when heated and is easy to compress?

a. liquid b. solid c. gas d. all of the above


17. Which of the following is a chemical property of water at 4C?

a. its temperature b. its color c. its state d. its ability to decompose into hydrogen and oxygen


18. What must be done to be certain that a chemical change has taken place?

a. Demonstrate that energy was absorbed by the reactants after the change. b. Check the composition of the sample before and after the change. c. Check for the production of bubbles before and after the change. d. Demonstrate that a release of energy occurred after the change.


19. Which of the following CANNOT be considered a single phase?

a. a pure liquid b. a homogeneous mixture c. a heterogeneous mixture d. a pure solid


20. Which of the following is true about homogeneous mixtures?

a. They have compositions that never vary. b. They are known as solutions c. They consist of two or more phases. d. They are always liquids.

21. Which of the following is true for all chemical reactions?

a. The total mass of the products is greater than the total mass of the reactants. b. The total mass of the reactants increases. c. The total mass of the reactants equals the total mass of the products. d. The total mass of the products is less than the total mass of the reactants.


22. When an iron nail is ground into powder, its mass ____.

a. increases b. cannot be determined c. stays the same d. decreases


23. A golf ball has more mass than a tennis ball because it ____.

a. contains more matter b. takes up more space c. has a definite composition d. contains different kinds of matter


24. Which of the following CANNOT be classified as a substance?

a. nitrogen b. table salt c. gold d. air


25. Which state of matter is characterized by having a definite shape and a definite volume?

a. liquid b. solid c. gas d. all of the above


26. Which of the following is true about compounds?

a. They can be physically separated into their component elements. b. They are substances. c. They have compositions that vary. d. They have properties similar to those of their component elements.


27. Which of the following is NOT an example of matter?

a. air b. heat c. water vapor d. smoke


28. The first figure in a properly written chemical symbol always is ____.

a. underlined b. boldfaced c. italicized d. capitalized


29. All of the following are physical properties of a substance in the liquid state EXCEPT ____.

a. not easily compressed b. indefinite shape c. indefinite volume d. definite mass


30. Which state of matter takes both the shape and volume of its container?

a. solid b. liquid c. gas d. both b and c


31. A substance that can be separated into two or more substances ONLY by a chemical change is a(n) ____.

a. solution b. element c. mixture d. compound


32. What happens to matter during a chemical reaction?

a. Some matter is created. b. Matter is neither destroyed or created. c. Some matter is destroyed and some is created. d. Some matter is destroyed.


33. All of the following changes to a metal are physical changes EXCEPT ____.

a. rusting b. polishing c. melting d. bending


34. In the chemical reaction in which sucrose (TABLE SUGAR) is heated and decomposes to form carbon dioxide and water, which of the following is a reactant?

a. sucrose b. heat c. water d. carbon dioxide

35. Which of the following represents a compound?

a. H-3 b. H2O c. H d. O-16


36. Which of the following is a homogeneous mixture?

a. beef stew b. sand and water c. soil d. salt water


37. All of the following are physical properties of matter EXCEPT ____.

a. melting point b. color c. mass d. ability to rust


38. If a student heats 5 grams of a blue compound... and the reactants are 3 grams of a white compound and an unknown amount of a gas, how many grams of gas were produced? ____.

a. 5 b. 15 c. 2 d. 8


39. What would be the total mass of the productsof a reaction in which 10 grams of water was chemically changed into the elements hydrogen and oxygen?

a. 5 grams b. 10 grams c. 0 grams d. Not enough information


40. The chemical symbol for iron is ____.

a. Ir b. fe c. FE d. Fe


41. Which of the following is NOT a physical property of water?

a. It has a boiling point of 100C. b. It is a colorless liquid. c. Sugar dissolves in it. d. It is composed of hydrogen and oxygen.


42. A vapor is which state of matter?

a. gas b. solid c. liquid d. all of the above


43. Which of the following does NOT involve a physical change?

a. decomposing b. grinding c. melting d. mixing


44. An example of an extensive property of matter is ____.

a. hardness b. pressure c. mass d. temperature


45. What is one difference between a mixture and a compound?

a. A compound consists of more than one phase. b. A compound can only be separated into its components by chemical means. c. A mixture must be uniform in composition. d. A mixture can only be separated into its components by chemical means.


USE THIS TABLE TO ANSWER QUESTIONS 46-50

PHYSICAL PROPERTIES TABLE

Substance

Color

Melting point (C)

Boiling Point(C)

Bromine

Red-brown

-7

59

Chlorine

Green-yellow

-101

-34

Ethanol

Colorless

-117

78

Mercury

Silvery-white

-39

357

Neon

Colorless

-249

-246

Sulfur

Yellow

115

445

Water

Colorless

0

100

46. If you had a mixture of bromine, water, and ethanol, and you were trying to separate this mixture… Which substance would become a gas first in the distillation process?

a) Water b) Ethanol c) Bromine d) Not enough information


47. Which colorless substance is a liquid at 20C?

a) Neon b) Ethanol c) Water d) Both b and c

48. Which property is NOT useful when determining how to separate parts of a mixture:

a) Color b) Melting point c) Boiling point d) All are useful

49. Which substance has the lowest melting point?

a) Sulfur b) Ethanol c) Neon d) Chlorine

50. Which substance is a solid at -8C?

a) Sulfur b) Water c) Bromine d) a, b, and c



Essay

51. Essential question: What is matter, how can you describe matter, and what are the ways that matter can be changed?

Matter is anything that has mass and takes us space. We’ve learned that matter can be defined as substances or as mixtures. Substances are either elements (our most basic substance with unique properties) or compounds, which are made up FROM elements. Compounds can be separated into elements ONLY by chemical means. Mixtures can be either homogeneous (also called solutions), which a mixture with only one phase (distinguishable part) or as heterogeneous. A heterogeneous mixture has 2 or more distinct phases, which can be separated by PHYSICAL MEANS.

Matter can be described with extensive properties (which refer to the amount of a substance) or with intensive properties (which refer to characteristics). Physical properties describe things you can OBSERVE about a substance with only physical changes (examples: melting point, boiling point, hardness, color) and chemical properties describe substances ability to do other things (Iron is able to react with oxygen, vinegar has the ability to react with baking soda, sulfuric acid has the ability to melt plastic).



Matter cannot be created or destroyed, but matter can be rearranged. In a chemical reaction, the mass of products and reactants remains the same (Law of conservation of mass) but the reactants are usually rearranged (Example: Water (as a reactant) decomposing into Hydrogen and Oxygen (products).

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