wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

8th Grade Semester 1 Practice Exam

Total questions: 167

Worksheet time: 1hrs 27mins

Name
Class
Date
1.

If a fire erupts, immeadiately

a)

throw water on the fire

b)

notify the teacher

c)

run for the fire extinguisher

d)

open the window

2.

Which is permitted in the laboratory

a)

eating

b)

chewing gum

c)

drinking

d)

none of the above

3.

Do not leave a lit burner unattended

a)

True

b)

False

4.

The standard unit of mass is the

a)

gram

b)

liter

c)

cubic meter

d)

ounces

5.

4 g = ___________cg

a)

0.4

b)

4

c)

4000

d)

400

6.

2 m = ______________mm

a)

200

b)

0.2

c)

2000

d)

0.02

7.

What is the basic metric unit of volume?

a)

liter

b)

gram

c)

cubic meter

d)

ounce

8.

Volume is

a)

the amount of matter in an object

b)

the amount of space an object takes up

c)

the density of an object

9.

30 L=________dL

a)

3

b)

300

c)

3000

d)

30

10.

the standard unit of volume of a liquid is _______.

a)

liter

b)

cm3

c)

gram

d)

meter

11.

the density of a cube with a mass of 10 and a volume of 50

a)

.2

b)

.5

c)

2

d)

.15

12.

density of a book with a mass of 2g and a volume of 2cm3

a)

1

b)

3

c)

.25

d)

2

13.

an object with a density of less than 1 will

a)

float

b)

sink

c)

suspend in water

d)

all of the above

14.

if something sinks, its density must be

a)

more than 1

b)

equal to 1

c)

less than 1

d)

doesn´t have a density

15.

The physical property that makes metal pots good for cooking is

a)

Flammability

b)

Flexibility

c)

Electrical conductivity

d)

Heat conductivity

16.

Which is true about matter

a)

It has mass and is a liquid

b)

It is a solid that takes up space

c)

It has mass and takes up space

d)

It is always a substance

17.

Which is not true about a pool of water and piece of ice

a)

They are in different states of matter

b)

They have different chemical properties

c)

They have the same composition

d)

None of the above

18.

Characteristics used to describe matter are called

a)

chemical and physical compositions

b)

physical composition

c)

Chemical properties

d)

Chemical and physical properties

19.

The three states of matter

a)

Solid, liquid, matter

b)

matter, liquid, gas

c)

Solid, liquid, gas

d)

None of the above

20.

Why is metal used to make the inside of lightbulbs

a)

It has good heat conductivity

b)

It has good electrical conductivity

c)

It is flammable

d)

It has a chemical property for that

21.

________ is the study of matter and changes in matter

a)

Chemistry

b)

Biochemistry

c)

Botany

d)

Physical study

22.

The ability for iron to rust is a ________ property

a)

Chemical

b)

Physical

23.

A(n) _______ is a single kind of matter that as a specific composition

a)

atom

b)

substace

c)

chemical property

d)

element

24.

Another term for the ability to burn is __________

a)

flammability

b)

electric conductivity

c)

flexibility

d)

chemistry

25.

A characteristic of a substance that can be observed without changing into another substance

a)

matter

b)

chemistry

c)

chemical property

d)

physical property

26.

A single kind of matter that is pure, meaning it always has a specific makeup, or composition

a)

matter

b)

element

c)

substance

d)

chemistry

27.

A characteristic of a substance that describes its ability to change into a different substance

a)

Physical property

b)

chemical property

c)

chemistry

d)

matter

28.

Texture is a _______ property

a)

chemical

b)

physical

29.

Lack of ability to rust is a ______________ property

a)

chemical

b)

physical

30.

Ability to conduct heat is a ______________ property

a)

chemical

b)

physical

31.

State is a ______________ property

a)

chemical

b)

physical

32.

An atom is the smallest part of

a)

energy

b)

salt

c)

matter

d)

cells

33.

how can a mixture of iron(metal) and sulfur be separated

a)

magnetic attraction

b)

distillation

c)

evaporation

d)

filtration

34.

Compounds are formed as a result of

a)

physical changes

b)

chemical combination

c)

distillation

d)

filtration

35.

How many Hydrogen Atoms are in sulfuric acid, H2SO4

a)

4

b)

0

c)

1

d)

2

36.

Water is an example of a(n)

a)

atom

b)

element

c)

mixture

d)

substance

37.

Salad dressing is a ______________ mixture.

a)

heterogeneous

b)

homogeneous

38.

the simplest type of substance is a

a)

compound

b)

element

c)

atom

d)

mixture

39.

substances in a mixture keep their own properties

a)

true

b)

false

40.

The substances in a "HETEROGENEOUS" mixture can usually be seen and are easily separated

a)

true

b)

false

41.

the chemical _______ for water is H2O

a)

compound

b)

formula

c)

bond

d)

mixture

42.

Shows elements in the compound and the ratio of atoms

a)

chemical formula

b)

compound

c)

chemical bond

d)

element

43.

A substance that cannot be broken down into any other substances by chemical or physical means.

a)

compound

b)

atom

c)

element

d)

ion

44.

A force of attraction between two atoms

a)

compound

b)

atom

c)

element

d)

chemical bond

45.

The basic particle from which all elements are made

a)

substance

b)

atom

c)

element

d)

ion

46.

A group of two or more atoms held together by chemical bonds

a)

compound

b)

molecule

c)

element

d)

substance

47.

Made of two or more substances that are together in the same place, but their atoms are not chemically bonded.

a)

substance

b)

molecule

c)

mixture

d)

chemical compound

48.

A substance made of two or more elements that are chemically combined in a set ratio.

a)

compound

b)

chemical formula

c)

mixture

d)

molecule

49.

which is not a physical change

a)

glass breaking

b)

iron rusting

c)

ice melting

d)

sugar dissolving

50.

which is not a chemical change

a)

leaves changing color

b)

fruit ripening

c)

silver tarnishing

d)

food color dissolving in water

51.

Butter is melted in a pan. Which of the following is true about the change?

a)

it is a physical change that releases energy

b)

it is a chemical change that absorbs energy

c)

it is a physical change that absorbs energy

d)

it is a chemical change with no change in energy

52.

The amount of space that matter fills is its ________

a)

Mass

b)

Volume

c)

viscosity

d)

pressure

53.

A state of matter with a definite volume, but no definite shape

a)

gas

b)

solid

c)

liquid

d)

mass

54.

a(n) __________ will always take the shape and volume of its container

a)

gas

b)

solid

c)

liquid

d)

mass

55.

A state of matter with a definite volume and a definite shape

a)

gas

b)

solid

c)

liquid

d)

mass

56.

the ______________ is a measure of the average speed of the particles in a substance

a)

viscosity

b)

temperature

c)

pressure

d)

mass

57.

the _______________ of a gas is the force of its outward push divided by the area of the walls of its container

a)

temperature

b)

viscocity

c)

pressure

d)

mass

58.

Solids that are made up of crystals, and have definite melting points

a)

crystalline solid

b)

amorphous solid

c)

solid

d)

surface tension

59.

Another name for a liquid, meaning “substance that flows”

a)

liquid

b)

viscocity

c)

fluid

d)

gas

60.

An inward force, or pull, among the molecules in a liquid that brings the molecules on the surface closer together.

a)

surface tension

b)

viscocity

c)

fluid

d)

gas

61.

a liquid's resistance to flowing

a)

viscocity

b)

surface tension

c)

fluid

d)

pressure

62.

Solids in which the particles are not arranged in a regular pattern, no definite melting point.

a)

amorphous solid

b)

crystalline solid

c)

solid

d)

liquid

63.

Which of the following describes the process of freezing

a)

Freezing occurs when the temperature of a substance drops to 0°C

b)

Freezing occurs when the particles of a solid vibrate so fast that they break free

c)

Freezing occurs when the temperature drops enough a gas turns into a solid

d)

Freezing occurs when the particles in a liquid slow down and take fixed positions.

64.

Particles of which of the following have the greatest thermal energy?

a)

liquid

b)

crystalline solid

c)

gas

d)

amorphous solid

65.

at higher temperatures

a)

particles in an object have less energy

b)

particles in an object move faster

c)

a gas contracts

d)

a liquid contracts

66.

The temperature at which a liquid boils

a)

melting point

b)

boiling point

c)

subliming

d)

freezing

67.

The change from a solid to a gas

a)

Subliming

b)

Melting

c)

Condensing

d)

Boiling

68.

The change from a liquid to a solid

a)

Subliming

b)

Vaporizing

c)

Condensing

d)

Freezing

69.

In pure crystalline solids melting occurs at a specific temperature

a)

melting point

b)

boiling point

c)

subliming

d)

Melting

70.

Vaporization that takes place both below and at the surface of a liquid

a)

Vaporizing

b)

melting

c)

boiling

d)

freezing

71.

The change from a solid to a liquid

a)

Melting

b)

Freezing

c)

Condensing

d)

Subliming

72.

The change from a gas to a liquid

a)

Condensing

b)

Vaporizing

c)

Subliming

d)

Melting

73.

The change from a liquid to a gas

a)

Condensing

b)

Melting

c)

Vaporizing

d)

Subliming

74.

evaporation and _____________ are both types vaporization

a)

melting

b)

subliming

c)

boiling

d)

condensing

75.

Which state of matter undergoes changes in volume most easily

a)

solid

b)

gas

c)

liquid

d)

frozen

76.

According to Charles's law, when the temperature of a gas is increased, its

a)

particles move more slowly

b)

volume decreases

c)

mass inceases

d)

volume increases

77.

The change from liquid to solid, or the reverse of melting, is called

a)

sublimation

b)

boiling

c)

condensation

d)

freezing

78.

The state of matter in which particles are arranged in either a crystalline or an amorphous form is

a)

fluid

b)

gas

c)

liquid

d)

solid

79.

According to Boyle's law, when the pressure of a gas increases, its volume

a)

stays constant

b)

increases

c)

decreases

d)

increases, then decreases

80.

In which state of matter do the particles spread apart and fill all the space available to them?

a)

gas

b)

liquid

c)

crystal

d)

solid

81.

A graph that shows that the volume of a gas is directly proportional to its temperature demonstrates

a)

Charles's law

b)

the Pressure law

c)

the Density law

d)

Boyle's law

82.

A graph of Boyle's law shows the relationship between

a)

temperature and pressure of a gas

b)

temperature and volume of a gas.

c)

volume and density of a gas.

d)

volume and pressure of a gas.

83.

In which state of matter are particles packed tightly together in fixed positions?

a)

liquid

b)

compound

c)

solid

d)

gas

84.

When the volume of a gas is decreased, what happens to its pressure?

a)

it will vary

b)

it remains constant

c)

it increases

d)

it decreases

85.

When the temperature of a gas is decreased, what happens to its volume?

a)

it decreases

b)

it remains constant

c)

it will vary

d)

it increases

86.

How are the temperature and volume of a gas related?

a)

they are indirectly proportional

b)

the are inversely proportional

c)

they are constant

d)

they are directly proportional

87.

____________ law describes the relationship between a gas's volume and pressure when its temperature is constant

a)

Boyle's

b)

Charles's

c)

Combined Gas

d)

Ideal Gas

88.

_________ law describes the relationship between a gas's temperature and volume when its pressure is constant.

a)

Boyle's

b)

Charles's

c)

Ideal Gas

d)

Combined Gas

89.

At constant volume, when the temperature of a gas decreases, the pressure ____________

a)

directly

b)

decreases

c)

increases

d)

inversely

90.

At constant temperature, the pressure and volume of a gas are ___________________ proportional

a)

decreases

b)

inversely

c)

increases

d)

directly

91.

When the graph relating two variables is a straight line passing through the origin, the variables are _______________ proportional to each other.

a)

directly

b)

increases

c)

inversely

d)

decreases

92.

The graph of Boyle's Law is a _____________

a)

dot

b)

line

c)

curve

d)

squiggle

93.

The principle that when the temperature of a gas at a constant pressure is increased its volume increases, and when the temperature of a gas at constant pressure is decreased its volume decreases.

a)

Charles’s Law

b)

Directly Proportional

c)

Boyle’s Law

d)

Inversely Proportional

94.

When the product of two variables is constant

a)

Charles’s Law

b)

Directly Proportional

c)

Boyle’s Law

d)

Inversely Proportional

95.

When a graph of two variables is a straight line passing through the origin

a)

Charles’s Law

b)

Directly Proportional

c)

Boyle’s Law

d)

Inversely Proportional

96.

The relationship between the pressure and the volume of a gas, where if the volume of the gas increases the pressure decreases, and when the volume decreases the pressure increases

a)

Charles’s Law

b)

Directly Proportional

c)

Boyle’s Law

d)

Inversely Proportional

97.

the outside electrons in an atom with the highest energy.

a)

Valence Electron

b)

Electron Dot Diagram

c)

Chemical Bond

d)

physical bond

98.

The force of attraction that holds atoms together as a result of the rearrangement of electrons between them.

a)

Valence Electron

b)

Electron Dot Diagram

c)

Chemical Bond

d)

physical bond

99.

Only shows the valence electrons; includes the symbol for the element surrounded by dots.

a)

Valence Electron

b)

Electron Dot Diagram

c)

Chemical Bond

d)

physical bond

100.

Is Fluorine, which is a halogen, stable or reactive?

a)

Stable

b)

Reactive

c)

neither

d)

both

101.

Neon (Ne), which has an atomic number of 10 is in Group 18 in the periodic table. To which group does Neon belong?

a)

Alkali Metals

b)

Halogens

c)

Noble Gases

d)

Carbon Family

102.

The element directly below nitrogen in the periodic table is phosphorus (P). How many valence electrons does phosphorus have

a)

1

b)

5

c)

7

d)

3

103.

Will the properties of nitrogen be more similar to the properties of neon or the properties of phosphorus?

a)

Phosphorus

b)

Neon

c)

neither

d)

both

104.

Protons have a _________ charge

a)

Positive

b)

Neutral

c)

Negative

d)

0

105.

Protons have a mass of

a)

+2

b)

1

c)

0

d)

-1

106.

Neutrons have a mass of

a)

-1

b)

1

c)

+2

d)

0

107.

Neutrons have a _________ charge

a)

Negative

b)

+2

c)

Neutral

d)

Positive

108.

Electrons have a mass of

a)

+2

b)

1

c)

0

d)

-1

109.

Electrons have a _________ charge

a)

Negative

b)

Neutral

c)

+2

d)

Positive

110.

The Mass of an Atom equals the number of

a)

Protons + Electrons

b)

Protons

c)

Protons + Neutrons

d)

Neutrons + Electrons

111.

The nucleus of an atom is made of

a)

Protons + Neutrons

b)

Protons

c)

Neutrons + Electrons

d)

Electrons

112.

The electron cloud of an atom is made of

a)

Neutrons

b)

Protons + Electrons

c)

Electrons

d)

Neutrons + Electrons

113.

If an Atom is neutral these two numbers are the same

a)

Electrons + Charge

b)

Neutrons + Electrons

c)

Protons + Neutrons

d)

Protons + Electrons

114.

An Atom with 2 protons and a 1 neutrons and 2 electrons had a mass of

a)

-3

b)

-1

c)

3

d)

0

115.

An Atom with 1 protons and a 1 neutrons and 2 electrons had a mass of

a)

0

b)

2

c)

1

d)

3

116.

An Atom with 2 protons and a 1 neutrons and 2 electrons had a charge of

a)

3

b)

2

c)

0

d)

1

117.

An Atom with 1 protons and a 1 neutrons and 2 electrons had a charge of

a)

2

b)

-1

c)

1

d)

-2

118.

Oxygen is a

a)

Non-Metal

b)

Metal

119.

Magnesium is

a)

Non-Metal

b)

Metal

120.

Ionic bonds form between two ions that have

a)

opposite charges

b)

positive charges

c)

no charges

d)

negative charges

121.

Ions that are made of more than one atom are called

a)

sugar

b)

molecules

c)

solids

d)

polyatomic ions

122.

Which is most likely to form a negative ion?

a)

an Alkaline Earth Metal

b)

A Halogen

c)

A Carbon atom

d)

A Noble Gas

123.

Which is most likely to form a positive ion?

a)

an Alkaline Earth Metal

b)

A Halogen

c)

A carbon atom

d)

A Noble Gas

124.

What is the charge that a Group 1 Atom will make when it ionizes?

a)

-1

b)

+2

c)

0

d)

+1

125.

What is the charge that an Alkali Metal will make when it ionizes?

a)

-1

b)

0

c)

+2

d)

+1

126.

What is the charge that an Alkaline Earth Metal will make when it ionizes?

a)

0

b)

+2

c)

+1

d)

-2

127.

What is the charge that a Halogen will make when it ionizes?

a)

+1

b)

-3

c)

+2

d)

-1

128.

What is the charge that a Chalogen will make when it ionizes?

a)

0

b)

-2

c)

-1

d)

+2

129.

What is the charge that a Group 5 Atom will make when it ionizes?

a)

-2

b)

-1

c)

-3

d)

0

130.

What charge does a a chalogen make when it ionizes?

a)

+1

b)

+3

c)

-2

d)

0

131.

What is the charge that a Group 6 Atom will make when it ionizes?

a)

-1

b)

-2

c)

0

d)

+2

132.

What is the formula for an Ionic Bond between Magnesium and Phosphorous?

a)

Mg2P

b)

MgP3

c)

Mg3P2

d)

MgP

133.

What is the formula for an Ionic Bond between Magnesium and Oxygen?

a)

MgO3

b)

MgO

c)

Mg2O3

d)

Mg2O

134.

What is the formula for an Ionic Bond between Sodium and Oxygen

a)

NaO

b)

Na3O2

c)

Na2O

d)

Na2O3

135.

A(n) _____________ is an atom or group of atoms that has an electric charge.

a)

Ion

b)

Metal

c)

Liquid

d)

Solid

136.

When an atom loses a valence electron, it becomes a(n) _____________ ion.

a)

Negative

b)

Neutral

c)

Positive

d)

0

137.

In an ionic compound, the total positive charge of all the positive ions _______________ the total negative charge of all the negative ions.

a)

is less than

b)

both

c)

equals

d)

is more than

138.

In order to have a stable arrangement of 8 valence electrons, metal atoms are likely to ____________ electrons.

a)

lose

b)

gain

139.

In order to have a stable arrangement of 8 valence electrons, non-metal atoms are likely to ____________ electrons.

a)

gain

b)

lose

140.

How many protons does He have

a)

1

b)

2

c)

3

d)

7

141.

How many Protons does Argon have?

a)

16

b)

40

c)

18

d)

39

142.

How many valence electrons does Carbon have?

a)

4

b)

1

c)

3

d)

8

143.

How many valence electrons does Sodium have?

a)

4

b)

1

c)

3

d)

8

144.

How many valence electrons does Oxygen have?

a)

4

b)

6

c)

3

d)

8

145.

How many neutrons does Se have with a mass of 79?

a)

43

b)

45

c)

44

d)

46

146.

How many neutrons does Ca have with a mass of 40?

a)

19

b)

20

c)

21

d)

22

147.

How many total electrons does a neutral atom of Cl have?

a)

8

b)

7

c)

17

d)

18

148.

How many total electrons does a Cl atom have with a charge of -1

a)

18

b)

8

c)

7

d)

17

149.

How many shells/rings of electrons does Na have?

a)

3

b)

5

c)

7

d)

6

150.

How many shell/rings of electrons does Hydrogen have?

a)

1

b)

7

c)

3

d)

6

151.

How many shells/rings of electrons does Fluorine have?

a)

1

b)

4

c)

3

d)

2

152.

The attraction between two oppositely charged ions.

a)

Ion

b)

Subscript

c)

Ionic Bond

d)

Polyatomic Ion

153.

A group of symbols that shows the ratio of elements in a compound.

a)

chemical formula

b)

ionic compound

c)

polyatomic ion

d)

ionic compound

154.

The shape ions form into.

a)

Chemical Formula

b)

Ionic Compound

c)

Crystal

d)

Subscript

155.

Tells the ratio of elements in a compound.

a)

Ionic Bond

b)

Subscript

c)

Chemical Formula

d)

Ionic Compound

156.

Ions that are made of more than one atom.

a)

Ion

b)

Ionic Compound

c)

Polyatomic Ion

d)

Subscript

157.

An atom or group of atoms that has an electric charge.

a)

Ion

b)

Ionic Bond

c)

Subscript

d)

Polyatomic Ion

158.

a bond in which six electrons are shared

a)

Molecule

b)

Triple Bond

c)

Double Bond

d)

Molecular Compound

159.

A covalent bond in which electrons shared equally.

a)

Nonpolar Bond

b)

Polar Bond

c)

Molecular Compound

d)

Triple Bond

160.

A compound that is made up of molecules.

a)

Triple Bond

b)

Polar Bond

c)

Molecular Compound

d)

Double Bond

161.

a bond in which four electrons are shared.

a)

Double Bond

b)

Molecule

c)

Triple Bond

d)

Polar Bond

162.

A covalent bond in which electrons are shared unequally.

a)

Nonpolar Bond

b)

Molecular Compound

c)

Polar Bond

d)

Triple Bond

163.

Two bonded atoms.

a)

Nonpolar Bond

b)

Triple Bond

c)

Molecular Compound

d)

Molecule

164.

The chemical bond formed when 2 atoms share electrons.

a)

Double Bond

b)

Covalent Bond

c)

Triple Bond

d)

Nonpolar Bond

165.

A single bond shares

a)

2 electrons

b)

6 electrons

c)

3 electrons

d)

4 electrons

166.

A double bond shares

a)

2 electrons

b)

3 electrons

c)

4 electrons

d)

6 electrons

167.

A triple bond shares

a)

2 electrons

b)

3 electrons

c)

4 electrons

d)

6 electrons

Similar Resources on Wayground

cells

168 questions

cells

quiz

Worksheet

•

4th - 12th Grade

Enrichment 4/12 - 8th Science STAAR Review

164 questions

Enrichment 4/12 - 8th Science STAAR Review

quiz

Worksheet

•

8th Grade

FSA Review

164 questions

FSA Review

quiz

Worksheet

•

6th - 8th Grade

Bones,Muscles and Digestive Systems 2022

170 questions

Bones,Muscles and Digestive Systems 2022

quiz

Worksheet

•

7th - 8th Grade

SEL-IZAM

167 questions

SEL-IZAM

quiz

Worksheet

•

8th Grade