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7th grade solution revision

Total questions: 156

Worksheet time: 2hrs 16mins

Name
Class
Date
1.

A solution with high amount of solute

a)

concentrated

b)

saturated

c)

unsaturated

d)

diluted

2.

Water and salt are mixed together. Hot water, coffee and sugar are mixed together. Which substance is the solvent in both?

a)

sugar

b)

water

c)

coffee

d)

salt

3.

Weak tea is an example of a _______.

a)

suspension

b)

solvent

c)

concentrated solution

d)

dilute solution

4.

When you add so much solute that no more dissolves, you have ...

a)

neutralization

b)

unsaturated solution

c)

saturated solution

d)

suspension

5.

A solution that is considered dilute would be ...

a)

dark in color

b)

have a strong scent

c)

have a large amount of solute

d)

have a small amount of solute

6.

In the picture beside, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve in water?

a)

stir the powder in the liquid

b)

freeze the mixture

c)

add more powder to liquid

d)

store the mixture

7.

In which beaker does salt dissolves faster?

a)

ice water

b)

room temperature

c)

hot water

8.

Type of mixture in which all substances are evenly distributed is a ?

a)

solute

b)

solvent

c)

Solution

9.

What is a solvent?

a)

the substance that is being dissolved in a solution

b)

the mixing of different substances

c)

the substance that does the dissolving in a solution

10.

What is a solute?

a)

the substance that is dissolved into the solution

b)

the substance that does the dissolving in a solution

c)

the mixing of different substances

11.

Which of the following will allow for more solute than normal to be dissolved in a solvent?

a)

freezing the solution

b)

cooling the solution

c)

shaking the solution

d)

heating the solution

12.

Vinegar is a solution that is made up of acetic acid dissolved in water. Which part of the solution is the solute?

a)

acetic acid

b)

water

13.
The _____is the part that gets dissolved. 
a)
solute 
b)
solvent 
c)
solution 
d)
Sacajawea 
14.
A solution is a kind of ________. 
a)
mixture 
b)
compound 
c)
element 
d)
stuff 
15.
A solution is a ________ mixture. 
a)
heterogeneous 
b)
homogeneous 
c)
dumb 
d)
mixed 
16.
The universal solvent is ______. 
a)
sodium 
b)
acid 
c)
water 
d)
wind 
17.
When one of the parts of the solution is water we call it _________. 
a)
water stuff 
b)
water mixture 
c)
aqua-man
d)
aqueous 
18.
This is the part of the solution that does the dissolving. 
a)
solute
b)
solvent 
c)
salt water 
d)
First Continental Congress 
19.
Solubility is a ________ property. 
a)
neat 
b)
chemical 
c)
physical 
d)
an organic 
20.
According to Mr. Edmonds aqueous solutions are __________. 
a)
explosive 
b)
heterogeneous 
c)
squishy 
d)
transparent 
21.

The ______ is the smaller part of the solution.

a)

solute

b)

solvent

c)

system of a down

22.

This is a mixture that will settle over time if you let it sit.

a)

Suspension

b)

Colloid

c)

Mix - Mix a lot

23.
What is a "homogeneous mixture of two or more substances in a single phase"?
a)
Solution
b)
Solvent
c)
Solute
d)
Compound
24.
What does it mean to be "Soluble" ?
a)
Capable of being a solid.
b)
To have soul.
c)
Capable of being dissolved.
d)
To sink.
25.
Which of the following are considered to be heterogeneous mixtures?
a)
Colloid
b)
Solution
c)
Suspension
d)
Both Orange and Blue are right
26.
Which of the following are considered to be a homogeneous mixture?
a)
Colloid
b)
Solution
c)
Suspension
d)
All Mixtures
27.
What is the unit for molarity?
a)
mass/liters
b)
moles
c)
liters
d)
moles/liter
28.
A measure of the amount of solute in a given amount of solvent or solution is...
a)
saturated
b)
solubility
c)
concentration
d)
miscible
29.
A saturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
30.
A supersaturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
31.
An unsaturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
32.
An electrolyte is...
a)
The rapid, random movement of particles in colloidal dispersion.
b)
A substance that dissolves in water and conducts electric current.
c)
A substance that dissolves in water and does not conduct electric current.
d)
The solution process when water is the solvent.
33.
A nonelectrolyte is...
a)
The rapid, random movement of particles in colloidal dispersion.
b)
A substance that dissolves in water and conducts electric current.
c)
A substance that dissolves in water and does not conduct electric current.
d)
The solution process when water is the solvent.
34.
The dissolving medium in a solution is called ... 
a)
colloid
b)
solution
c)
solute
d)
solvent
35.
The substance dissolved in a solution is called ... 
a)
colloid
b)
solution
c)
solute
d)
solvent
36.
What is the molarity of a 2 liter solution containing 5 moles of NaCl?
a)
2.5
b)
0.4
c)
2.5 moles/liter
d)
10 moles/liter
37.
How many moles of NaCl are present in 6000. ml a 1.5 M NaCl solution?
a)
9 moles NaCl
b)
9000
c)
9
d)
4000  moles NaCl
38.

In a solution, the substance that is dissolved is called the _________________.

a)

colloid

b)

solute

c)

solvent

d)

suspnsion

39.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
40.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
41.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
42.
air is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
43.
Another name for a homogeneous mixture is 
a)
an element.
b)
a solution.
c)
a compound.
44.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
45.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

46.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

47.

Which solution is more concentrated?


Solution 1:

20 mL of water

5 g of salt


Solution 2:

20 mL of water

10 g of salt

a)

Not enough information to tell

b)

Solution 1

c)

Solution 2

d)

They are equally concentrated

48.

In order to dilute a solution, you need to

a)

add more of the solid

b)

add more water

c)

find the mass

d)

find the volume

49.

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt


Solution 2:

500 mL of water

60 g of salt

a)

Not enough information to tell

b)

Solution 1

c)

Solution 2

d)

They are equally diluted

50.

The EASIEST way to determine which Koolaid solution is the most concentrated is to...

a)

compare their mass

b)

compare their color

c)

evaporate each solution

51.

In order to compare the concentration of two solutions on a balance, the two solutions must have equal volumes.

a)

true

b)

false

52.

Both elements and compounds are pure substances.

a)

Agree

b)

Disagree

53.

Two or more different elements chemically combine to form compounds.

a)

Agree

b)

Disagree

54.

Both elements and compounds are pure substances.

a)

Agree

b)

Disagree

55.

Two or more different elements chemically combine to form compounds.

a)

Agree

b)

Disagree

56.

Compounds have properties different from the elements that make it up.

a)

Agree

b)

Disagree

57.

Represented by an unique chemical symbol

a)

Elements

b)

Compounds

c)

Both

58.

Can be broken down into a simpler substance

a)

Elements

b)

Compounds

c)

Both

59.

Located on the Periodic Table

a)

Elements

b)

Compounds

c)

Both

60.

Composed of at least two different elements

a)

Elements

b)

Compounds

c)

Both

61.

Cannot be broken down into a simpler substance

a)

Elements

b)

Compounds

c)

Both

62.

This picture represents which of the following?

a)

element

b)

compound

63.

This picture represents which of the following?

a)

element

b)

compound

64.

This picture represents which of the following?

a)

element

b)

compound

65.

This picture represents which of the following?

a)

element

b)

compound

66.

This picture represents which of the following?

a)

element

b)

compound

67.

This picture represents which of the following?

a)

element

b)

compound

68.

This picture represents which of the following?

a)

element

b)

compound

69.

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

a)

a gas at room temperature.

b)

made of two different elements.

c)

given off by green plants.

d)

useful to human beings

70.

Compounds are different than elements because compounds are ---

a)

combinations of two or more elements.

b)

not able to be broken down into parts.

c)

made from the same type of atoms.

d)

a pure substance; elements are not.

71.
A compound consists of two or more elements bound together.
a)
True
b)
False
72.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
73.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
74.

The smallest particle of matter that makes up an element and a compound?

a)

Element

b)

Chemical

c)

Atom

d)

Substance

75.

Which statement best describes an element?

a)

pure, made of more than one type of atom

b)

when combined, a chemical reaction forms

c)

pure, made of only one type of atom

d)

can be broken down easily

76.
Which one can be found on the periodic table?
a)
Compound 
b)
Element
77.
Which one has more than one type of atom in it?
a)
Element
b)
Compound 
78.

Helium (He) is an example of an:

a)

Element

b)

Compound

c)

Solution

d)

Mixture

79.

When two or more different elements chemically combine, a __________________________ is formed.

a)

element

b)

compound

c)

mixture

d)

solution

80.

Examples are water (H2O) and carbon dioxide (CO2).

a)

elements

b)

compounds

81.

This picture represents which of the following?

a)

element

b)

compound

82.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
83.

Both elements and compounds are pure substances.

a)

Agree

b)

Disagree

84.

Two or more different elements chemically combine to form compounds.

a)

Agree

b)

Disagree

85.

Every compound has a chemical formula.

a)

Agree

b)

Disagree

86.

Carbon, Ar, and Ne are examples of elements.

a)

Agree

b)

Disagree

87.

Represented by an unique chemical symbol

a)

Elements

b)

Compounds

c)

Both

88.

Can be broken down into a simpler substance

a)

Elements

b)

Compounds

c)

Both

89.

Located on the Periodic Table

a)

Elements

b)

Compounds

c)

Both

90.

This picture represents which of the following?

a)

element

b)

compound

91.

This picture represents which of the following:

a)

element

b)

compound

92.

This picture represents which of the following?

a)

element

b)

compound

93.

This picture represents which of the following?

a)

element

b)

compound

94.

Which is the best description of an element?

a)

A substance that cannot be broken down into simpler substances

b)

A collection of atoms that have different abilities when joined together

c)

A man-made mineral

d)

A mixture of substances

95.

Which one is a compound?

a)

Ni

b)

F

c)

Re

d)

NaCl

96.

How many different elements are in the compound?

a)

12

b)

3

c)

24

d)

6

97.

The place where known elements are represented...

a)

The Periodic Table

b)

Compounds

c)

Chemical Formula

d)

Graph

98.

One way to tell how many elements a compound has is to...

a)

multiply the number

b)

count the capital letters

c)

add up all the numbers

d)

count the letters

99.

A substance that consists of 2 or more different elements is a...

a)

element

b)

data table

c)

symbol

d)

compound

100.

Which of the following represents an element?

a)

H2O

b)

H2

c)

NaCl

d)

CaCO3

101.

What is made up of two or more elements that are chemically combined?

a)

Element

b)

Mixture

c)

Compound

d)

Solids

102.

How many elements are represented in the compound?

Na2CO3

a)

1

b)

2

c)

3

d)

4

103.

How many elements are represented in the compound?

Na2CO2H2C

a)

5

b)

2

c)

3

d)

4

104.

Which of the following is not a compound?

a)

HCl

b)

Cl

c)

NaCl

d)

CO2

105.

Which answer choice cannot be broken down into other substances?

a)

Compound

b)

Mixture

c)

Solids

d)

Element

106.

Which answer choice is made up of two or more elements that are chemically combined?

a)

Element

b)

Mixture

c)

Compound

d)

Solids

107.

How many Elements are in this compound?

CuSO4

a)

3

b)

1

c)

4

d)

5

108.

Which element is found in the ocean and the atmosphere?

a)

Sodium

b)

Oxygen

c)

Hydrogen

d)

Nitrogen

109.

Which answer can be found on the periodic table?

a)

Compound

b)

Element

110.

Which element does the chemical symbol AI stand for?

a)

Gold

b)

Actinium

c)

Iron

d)

Aluminum

111.

Which element is found in the atmosphere, ocean, living things, and the earth's crust?

a)

Chlorine

b)

Aluminum

c)

Oxygen

d)

Hydrogen

112.

All of the following elements are in Earth's crust except-

a)

Oxygen

b)

Sodium

c)

Alumunim

d)

Silicon

113.

I am anything that has mass and takes up space! What am I?

a)

energy

b)

matter

c)

molecules

d)

atoms

114.

How many different elements are in this chemical formula:

C2H2ClK3

(that is an L not an I)

a)

6

b)

8

c)

2

d)

4

115.

Which of the following chemical symbols is written correctly?

a)

ee

b)

hE

c)

C

d)

CL

116.

Which of the following chemical symbols for bromine is written correctly?

a)

bR

b)

BR

c)

Br

d)

br

117.

Which of the following can be found on the periodic table?

a)

Element

b)

Compound

c)

MIxture

118.

When two or more elements chemically combine a _____________ is formed.

a)

element

b)

compound

c)

mixture

d)

solution

119.

Which of the following is a pure substance containing only one kind of atom?

a)

element

b)

mixture

c)

compound

120.

True or False: Elements are pure substances.

a)

True

b)

False

121.

True or False: Compounds are pure substances.

a)

True

b)

False

122.

Which of the following is an example of an element?

a)

MgNaO3

b)

Al2

c)

NaCl

123.

Compounds are represented by a _________________.

a)

Chemical Symbol

b)

Chemical Formula

124.

Elements are represented by _______________.

a)

Chemical Symbol

b)

Chemical Formula

125.

The smallest unit of an element that has all of the properties of that element.

a)

Element

b)

Compound

c)

Mixture

d)

Atom

126.

The two most common elements found in the oceans are-

(Remember oceans are made up of water.)

a)

Sodium and Nitrogen

b)

Oxygen and Aluminum

c)

Iron and Carbon

d)

Oxygen and Hydrogen

127.

What is the most abundant element found in the earth's atmosphere?

a)

Oxygen

b)

Sulfur

c)

Nitrogen

d)

Argon

128.

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is-

a)

a gas at room temperature.

b)

made up of two different elements.

c)

given off by green plants.

d)

useful to human beings.

129.

Which of the following is the most abundant element on the Earth's crust?

a)

Calcium

b)

Iron

c)

Oxygen

d)

Potassium

130.

All of the following elements are major components of living things on Earth EXCEPT.

a)

nitrogen

b)

carbon

c)

sulfur

d)

oxygen

131.

What does the C represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

132.

Which of the following is not a compound?

a)

HCl

b)

NaCl

c)

Cl

d)

CO2

133.

Which of the following represents an element?

a)

H2O

b)

NaCl

c)

H2

d)

CaCO3

134.

Salt has a chemical formula of NaCl. Salt is a...

a)

Compound

b)

Mixture

c)

Element

d)

None of the Above

135.

What cannot be broken down into other substances?

a)

Compound

b)

Solids

c)

Mixture

d)

Element

136.

What is made up two or more elements that are chemically combined?

a)

Element

b)

Compound

c)

Mixture

d)

Solids

137.

How many elements are represented in the compound?

Na2CO3

a)

1

b)

2

c)

3

d)

4

138.

A combination of substances that are not chemically combined is called a(n)____________.

a)

mixture

b)

compound

c)

element

d)

metal

139.

What is the picture displayed?

a)

atom

b)

molecule

c)

element

d)

compound

140.

Which example is a compound?

a)

N2

b)

Cu

c)

O2

d)

H2O2

141.

Are there any compounds on the periodic table?

a)

Yes,there are many.

b)

No,because only elements are on the periodic table.

142.

What kind of pure substance forms when two elements chemically combine?

a)

an element

b)

a mixture

c)

a compound

d)

a solution

143.

Which statement best describes an element?

a)

pure, made of more than one type of atom

b)

when combined, a chemical reaction forms

c)

pure, made of only one type of atom

d)

can be broken down easily

144.
Which one can be found on the periodic table?
a)
Compound 
b)
Element
145.

Helium (He) is an example of an:

a)

Element

b)

Compound

c)

Solution

d)

Mixture

146.

When two or more different elements chemically combine, a __________________________ is formed.

a)

element

b)

compound

c)

mixture

d)

solution

147.

This picture represents which of the following?

a)

element

b)

compound

148.
a)
Element
b)
Compound
149.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
150.
A section of the Periodic Table of Elements is provided. What is the chemical symbol for magnesium?
a)
Mn
b)
Magnesium
c)
Mg
d)
12
151.
Compounds are different than elements because compounds are -
a)
A combination of two or more elements.
b)

B)not able to be broken down into parts
c)
made from the same type of atoms
d)
a pure substance, elements are not
152.
What is the difference between a compound and an element?
a)

Compounds are made up of elements and can be chemically separated. Elements cannot be separated.

b)

Elements make up compounds. Elements can be separated but compounds cannot be separated.

c)

Elements are found on the periodic table and compounds are found on the dining room table.

153.

Which of the following is the simplest form of substance?

a)

solution

b)

compound

c)

element

d)

mixture

154.

When one or more substance is combined it is called __________________.

a)

compound

b)

element

c)

mixture

d)

solution

155.

Which of the following statements describes an element?

a)

It contains only one kind of atom.

b)

It can be decomposed by ordinary chemical means.

c)

It is composed of atoms of two or more elements that bond together.

d)

It has unique properties that are different from the properties of its individual elements.

156.

Which of the following statements describes a compound?

a)

It contains only one kind of atom.

b)

It can be separated by physical means.

c)

It cannot be decomposed into simpler types of substances.

d)

It consists of atoms of two or more different elements bond together.

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