Chemistry Assessment

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Assessment

Chapter Test B
Chapter: Matter and Change
PART I In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question.

______ 1. Chemistry is a natural science that deals with the study of
a. living things and their life processes.
b. the physical features of Earth.
c. the composition, structure, properties, and changes of matter.
d. the composition, motion, and relative positions of stars and planets.
______ 2. The branch of chemistry in which the compositions of materials are identified is known as
a. biochemistry.
b. organic chemistry.
c. physical chemistry.
d. analytical chemistry.
______ 3. Which of these is an example of an extensive property?
a. mass
b. density
c. color
d. boiling point
______ 4. Which of these is an example of an element?
a. sugar
b. soil
c. water

d. oxygen

______ 5. Which of these is an example of a heterogeneous mixture?
a. salt
b. nitrogen
c. mud
d. air
______ 6. Which process is a chemical change?
a. heating to boiling
b. dissolving in alcohol
c. burning in air
d. slicing into two pieces
______ 7. At sea level, water boils at 100°C. This is an example of a(n)
a. chemical property.
c. physical property.
b. extensive property.
d. chemical change.
______ 8. Every pure chemical compound consists of two or more elements that
a. are combined chemically.
b. can be separated by a physical change.
c. cannot be separated.
d. are combined in any proportion.

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Chapter Test B, continued
PART II

Write the correct term (or terms) in the space provided.

9. The two properties that all matter has in common are

.

10. In the periodic table, elements in the vertical columns together form a(n)

.
11. A mixture that has the same proportion of components throughout is

considered to be

.

12. The substances that are formed by a chemical change are called the

.
13.

are elements that are good conductors of electricity.

14. The state of matter in which a material has a definite volume and a definite

shape is the

.

15. Elements are arranged in the periodic table according to their

.
16. The smallest unit of an element that has the properties of that element is a(n)

.
17. When atoms of two or more elements are chemically bonded, the substance

formed is a(n)

.

18. If testing shows an element is a poor conductor of electricity, it is probably

a(n)

.

19. A blend of two or more kinds of matter, each of which retains its own identity

and properties, is a(n)

.

20. If a material is tested and every sample has exactly the same properties and

the same composition, it is a(n)
21.

.

research is carried out for the sake of increasing knowledge.

22. A(n)

is an element that has some characteristics of metals

and some characteristics of nonmetals.

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Chapter Test B, continued
PART III For each of the following chemical reactions, identify the reactants and the products. 23. carbon ϩ oxygen → carbon dioxide

reactant(s): product(s): 24. mercury(II) oxide → mercury ϩ oxygen

reactant(s): product(s): PART IV On the line to the left of each symbol, write the letter of the correct element name.

______25. W

a. silicon

______26. Cl

b. sodium

______ 27. Co

c. cobalt

______28. Si

d. iron

______29. Na

e. tin

______30. Cu

f. tungsten

______31. Fe

g. chlorine

______32. Au

h. gold

______33. Sn

i. copper
j. silver

PART V Classify each of the following as either a physical change or a chemical change. 34.

melting an ice cube

35.

burning a piece of paper

36.

slicing a loaf of bread

37.

sharpening a pencil

38.

decomposing mercury(II) oxide

39.

dissolving sugar in water

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Chapter Test B, continued
PART VI

Write the answers to the following questions in the space provided.

40. Explain the differences between solid, liquid, and gaseous states in terms of the arrangement of the particles.

41. Contrast mixtures and pure substances.

42. State the law of conservation of energy.

43. Contrast heterogeneous and homogeneous mixtures.

44. How could you prove that water is a compound and not an element?

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TEACHER RESOURCE PAGE

Answer Key
1 Matter and Change, pp. 1–8
TEST A
1.
3.
5.
7.
9.
11.
13.
15.
17.
19.
21.
23.
25.

c a d d c a b b c a a c b

2.
4.
6.
8.
10.
12.
14.
16.
18.
20.
22.
24.

b b a b b d b b b b d b 37.
38.
39.
40.

41.

TEST B
1.
3.
5.
7.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
27.
29.
31.
33.
34.
35.
36.

c
2. d a 4. d c 6. c c 8. a mass and volume group or family homogeneous products metals solid state chemical properties atom compound nonmetal mixture pure substance basic metalloid reactants: carbon and oxygen; product: carbon dioxide reactant: mercury(II) oxide; products: mercury and oxygen f 26. g c 28. a b 30. i d 32. h e physical change chemical change physical change

42.

43.

44.

physical change chemical change physical change
In a solid, particles are packed together in relatively fixed positions.
The particles vibrate about a fixed point. In a liquid, particles are close together but can flow around one another. In a gas, particles are at great distances from one another, compared to the particles of liquids and solids.
The composition of a pure substance is the same throughout and does not vary from sample to sample. Pure substances include elements and compounds. A mixture contains more than one substance and can vary in composition from one sample to another and sometimes within different parts of the same sample.
Although energy can be absorbed or released in a change, it is not destroyed or created. It simply takes a different form.
Homogeneous mixtures are uniform in composition; heterogeneous mixtures are not.
An element cannot be broken down, but water can be decomposed into hydrogen and oxygen by passing an electrical current through it (electrolysis).

2 Measurements and
Calculations, pp. 9–17
TEST A
1.
3.
5.
7.
9.
11.
13.
15.
17.
19.
21.
23.
25.

a d a d d a d d d c d d c

2.
4.
6.
8.
10.
12.
14.
16.
18.
20.
22.
24.

c d a c b b a b a a d c Copyright © by Holt, Rinehart and Winston. All rights reserved.

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Answer Key