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Unit 2 - Properties of Matter 8th Grade

Total questions: 101

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

A substance made of only one type of

atom or molecule, example: elements, compounds

a)

dissolve

b)

pure substance

c)

solute

d)

homogeneous mixture

2.

A mixture that appears different throughout, example: salad

a)

mixture

b)

solution

c)

heterogeneous mixture

d)

dissolve

3.

A mixture that appears the same throughout, example: kool-aid

a)

heterogeneous mixture

b)

saturated

c)

homogeneous mixture

d)

mixture

4.

A combination of substances that can be separated by physical means

a)

solute

b)

mixture

c)

atom

d)

matter

5.

The lemonade in this glass is what type of mixture?

a)

Heterogeneous

b)

Homogeneous

6.

What type of mixture is shown?

a)

Homogeneous

b)

Heterogeneous

7.

What type of material is pictured?

a)

Element

b)

Compound

c)

Homogeneous mixture

d)

Heterogeneous mixture

8.

What type of material is pictured?

a)

Element

b)

Compound

c)

Heterogeneous mixture

d)

Homogeneous mixture

9.

A pure substance made of two or more different elements, example: H2O

a)

colloid

b)

compound

c)

atom

d)

solution

10.

Anything that has mass and volume

a)

pure substance

b)

mass

c)

compound

d)

matter

11.

A combination of substances that can be separated by physical means

a)

solute

b)

mixture

c)

atom

d)

matter

12.

A homogenous mixture made up of a solvent and a

solute that appears to be a pure substance, example: salt water

a)

dissolve

b)

mass

c)

solution

d)

pure substance

13.

Smallest unit of an element

a)

compound

b)

atom

c)

molecule

d)

product

14.

Substance that cannot be broken into simpler substances without changing its identity

a)

molecule

b)

proton

c)

element

d)

gram

15.

An example of a heterogeneous mixture

a)

vinegar

b)

cereal in milk

c)

dishwashing detergent

d)

sugar water

16.

Smallest unit of a compound

a)

element

b)

density

c)

atom

d)

molecule

17.

Substance made up of chemically combined elements

a)

electron

b)

compound

c)

element

d)

atom

18.

an example of a homogeneous mixture

a)

rain water

b)

salad dressing

c)

soil

d)

pizza

19.

What is an example of a compound?

a)

Table salt (NaCl)

b)

Air

c)

Oxygen (O2)

d)

Salt water

20.

A mixture is uniform within the substance, evenly mixed, and cannot be distinguished visibly. This mixture is called ___.

a)

homogeneous

b)

substance

c)

compound

d)

heterogeneous

21.

Which of the following is an element?

a)

O2

b)

CO2

c)

H2O

d)

CH

22.

What is an example of a mixture?

a)

Air

b)

Oxygen (O2)

c)

Pure water (H2O)

d)

Table salt (NaCl)

23.

NaHCO3 is an example of ___.

a)

a compound

b)

an element

c)

a mixture

d)

an abbreviation

24.

The picture shows ____.

a)

a compound

b)

an element

c)

a mixture

d)

an organic

25.

The picture shows ____.

a)

a compound

b)

an element

c)

a mixture

d)

an organic

26.

The picture shows ____.

a)

a compound

b)

an element

c)

a mixture

d)

an organic

27.

What is shown in the drawing?

a)

a compound

b)

an electron

c)

a mixture

d)

an atom

28.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
29.

Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?

a)

Picture A

b)

Picture B

c)

Picture C

d)

Picture D

30.

Why kind of mixture is this?

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

31.

Which state of matter is represented by the double oxygen atoms?

a)

Element

b)

Compound

c)

Mixture

d)

Solution

32.

A mixture that appears uniform throughout

a)

homogenous mixture

b)

heterogenous mixture

c)

elemental mixture

d)

compound mixture

33.

A mixture that has visually distinguishable components

a)

homogenous mixture

b)

elemental mixture

c)

heterogeneous mixture

d)

compound mixture

34.

Which type of mixture is represented in this image?

(Think: Are the particles spread out evenly throughout, or are the particles chunked together?)

a)

Compound mixture

b)

Heterogeneous mixture

c)

Homogeneous mixture

d)

Elemental mixture

35.

Which type of mixture is represented in this image?

(Think: Are the particles spread out evenly throughout, or are the particles chunked together?)

a)

Homogeneous mixture

b)

Elemental mixture

c)

Heterogeneous mixture

d)

Compound mixture

36.

Which list of formulas represents compounds, only?

a)

NaCl, H₂O, CO

b)

H₂, N₂, O₂

c)

H₂, Ne, NaCl

d)

MgO, NaCl, O₂

37.

Which of the following is an example of COHESION?

a)

water sticking to water

b)

water sticking to glass

c)

oil sticking to plastic

d)

hydrogen sticking to oxygen

38.

What is the correct chemical formula for water?

a)

H2O

b)

HO2

c)

H2O2

d)

2H1O

39.

Water is polar. What does that mean?

a)

it is a molecule with opposite charges on opposite ends

b)

it is a molecule with no charge

c)

it is a molecule with identical charges on opposite ends

d)

it is a molecule with too many protons

40.

Water sticks well to many materials. What term relates to this property of water?

a)

cohesion

b)

adhesion

c)

density

d)

surface tension

41.

What is the term for water's ability to defy gravity and climb up a tube?

a)

Capillary Action

b)

Specific Heat

c)

Universal Solvent

d)

Magic

42.

A water strider can skate along the top of a pond because:

a)

covalent bonds result in water cohesion (surface tension)

b)

hydrogen bonds result in water cohesion (surface tension)

c)

water striders have adapted to take advantage of water cohesion

d)

water striders are afraid of water and avoid it

43.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
44.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
45.

Which property of water allows water to climb up a tree's root system to the leaves?

a)

Cohesion

b)

water's density

c)

Polarity

d)

Capillary Action

46.

Water is a (a)   molecule due to it having a positive AND negative end.

47.

What two elements make up water?

a)

Helium and Oxygen

b)

Hydrogen and Oxygen

c)

Helium and Carbon

d)

Oxygen and Carbon

48.

How many hydrogen atoms are in a water molecule?

(HINT: H20)

a)

5

b)

1

c)

2

d)

0

49.

A water molecule is a _______ since the negative end of one water molecule is attracted to the positive end of another water molecule.

a)

polar molecule

b)

sustain life

c)

surface tension

d)

specific heat

50.

The pH of pure water is what?

a)

7

b)

8

c)

2

d)

14

51.

A process powered by adhesion that causes water molecules to move upward through a narrow tube such as the stem of a plant is called...

a)

polar molecule

b)

surface tension

c)

capillary action

d)

specific heat

52.

An attraction between molecules of different substances is called...

a)

adhesion

b)

cohesion

53.

Water is called the ________ because it dissolves so many substances.

a)

polar molecule

b)

universal solvent

c)

specific heat

d)

surface tension

54.

A measure of how difficult it is to stretch or break the surface of a liquid is called...

a)

specific heat

b)

polar molecule

c)

capillary action

d)

surface tension

55.

Because of its _______, water dissolves many substances.

a)

solvent

b)

solution

c)

polarity

d)

solute

56.

An attraction between molecules of the same substance is called...

a)

adhesion

b)

cohesion

57.

Water molecules ________ since the slightly positive portion of a water molecule is attracted to the slightly negative portion of the next water molecule.

a)

stick together

b)

spread out

58.

The amount of space taken up by matter is ...

a)

mass

b)

volume

c)

density

59.

Attraction between molecules of the same substance is known as (a)   .

Choose from the below words
Buffer
Adhesion
Hydrogen Bond
Cohesion
60.

Attraction between differnt kinds of molecules.

a)

Cohesion

b)

Carbon Bond

c)

Hydrogen Bond

d)

Adhesion

61.

Type of mixture in which all the components are evenly distributed.

a)

Solution

b)

Solute

c)

Solvent

d)

Suspension

62.

Scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution.

a)

Hydrogen Bond

b)

pH Scale

c)

Acid

d)

Base

63.

A solution with a pH less than 7. (high H+ concentration)

a)

pH Scale

b)

Base

c)

Acid

d)

Buffer

64.

A solution with a pH more than 7. (High OH- concentration)

a)

Acid

b)

Buffer

c)

Hydrogen Bond

d)

Base

65.

The attraction between water molecules is ___.

a)

adhesion

b)

cohesion

66.

Which of the following is an example of COHESION?

a)

water sticking to water

b)

water sticking to glass

c)

oil sticking to plastic

d)

hydrogen sticking to oxygen

67.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
68.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes
b)
Capillary action pulls the water molecules like a chain
c)
Water is pulled by gravity
d)
Water’s cohesion causes it to “pull” towards the leaves
69.

Which of these pH values represent an acid?

a)

4

b)

8

c)

10

d)

12

70.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

71.

Which of the following are properties of acids?

a)

They conduct electricity when dissolved in water

b)

They taste sour

c)

They react with metals to produce hydrogen gas

d)

All of the answer choices are correct

72.

Which of the following is an acid?

a)

vinegar

b)

bleach

c)

sugar in water

d)

starch in water

e)

toothpaste in water

73.

Which of the following is a property of a base?

a)

bitter taste

b)

reacts with metals

c)

salty

d)

sour taste

74.

All bases have a sour taste.

a)

True

b)

False

75.

Which of the following pH values represents a base?

a)

2.1

b)

4.6

c)

6.8

d)

8.1

76.

The strongest bases have pH values close to

a)

0

b)

14

c)

7

d)

5

77.

Which of the following is a base?

a)

baking soda in water

b)

orange juice

c)

vinegar

d)

lemonade

78.

Ocean water is only slightly basic. What might its pH value be?

a)

5

b)

8

c)

12

d)

2

79.

Bases turn indicator paper red.

a)

True

b)

False

80.

If the substance is neutral, what would the pH be?

a)

3

b)

5

c)

7

d)

9

e)

11

81.

An acid has a pH

a)

higher than 7

b)

lower than 7

c)

7

d)

greater than 14

82.

a base has a pH of

a)

lower than 7

b)

higher than 7

c)

7

d)

it only has a pOH

83.

lemon juice is a

a)

acid

b)

base

84.
A solution with a pH of 8.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
85.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
86.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
87.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
88.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
89.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)

baking soda

90.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
91.
Values from 0-14 that determine the acidity of a solution
a)
Punnett Square
b)
Matrix
c)
pH scale
d)
Math number line 
92.

Substance that is neither acidic nor basic it is said to be _______.

a)

acidic

b)

Basic

c)

Neutral

93.
What does corrosive mean?
a)
That a substance is a strong base.
b)
That a substance is neutral.
c)
That a substance can easily wear away
d)
The substance is the strongest acid
94.
Many cleaning solutions are bases. Which of the following is a property of most bases?
a)
feels slippery
b)
white color
c)
can only be liquid
d)
tastes sour
95.
Which food is the most acidic?
a)
bananas
b)
lemon juice
c)
orange juice
96.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
97.

Weaker Bases have a pH closer to 7

a)

True

b)

False

98.
tastes sour
a)
acid
b)
base
99.
tastes bitter
a)
base
b)
acid
100.
feels slippery
a)
acid
b)
base
101.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20

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