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Worksheets

Yr 8 Chemistry Revision

Total questions: 137

Worksheet time: 2hrs 17mins

Name
Class
Date
1.
Which state of matter has a definite shape?
a)
Gas
b)
Solid
c)
Liquid
d)
Plasma
2.
Liquids....
a)
have a definite shape
b)
are always clear
c)
take the shape of their container
d)
are not matter
3.
Water vapor cooling and turning into water droplets/steam is an example of......
a)
Condensation
b)
Melting
c)
Freezing
d)
Evaporation
4.
Particles in this state of matter are moving the fastest.
a)
solid
b)
liquid
c)
gas
5.
Particles in this state of matter are moving the slowest.
a)
solid
b)
gas
c)
liquid
6.
This state of matter takes both the shape and volume of it container.
a)
gas
b)
solid
c)
liquid
7.
In this state of matter, there is a strong attraction between molecules and they cannot break away from each other. 
a)
solid
b)
liquid
c)
gas
8.
In this state of matter, the molecules can move around each other, but cannot break the force of attraction between them.
a)
liquid
b)
gas
c)
solid
9.
The state of matter in which the atoms are locked and vibrate in place. 
a)
solid
b)
liquid
c)
gas
10.
Changes in a materials state of matter 
a)
physical property
b)
chemical property
11.

When a solid changes straight to a gas.

a)

condensation

b)

sublimation

c)

deposition

d)

freezing

12.

When a gas turns straight to solid.

a)

sublimation

b)

melting

c)

deposition

d)

evaporation

13.
When we describe the size, shape, smell, feel of an object, we are describing its _______________________________.. 
a)
mass
b)
properties
c)
volume
d)
matter
14.
Which states allow easy flow of particles
a)
Gas and Solid
b)
Gas and Liquid
c)
Solid and Liquid
d)
Gas only
15.
Can Solids be compressed?
a)
No
b)
Yes
c)
Sometimes (it depends what it's made of)
d)
Generally no
16.
What happens to particles as they heat up?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
17.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
18.

At which point does the substance finish boiling

a)

B

b)

C

c)

E

d)

F

e)

D

19.
What two types of measurements make up DENSITY? 
a)
Mass and Volume
b)
Temperature and Mass
c)
Grams and Centimeters
d)
Volume and Weight
20.
Taking energy away from a substance will make its particles move
a)
more slowly
b)
more quickly
c)
at the same speed
21.
The change from a gas to a liquid is called 
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
22.
The state that matter exists in depends on its 
a)
volume 
b)
weight
c)
temperature 
d)
mass
23.
Adding more heat energy to particles of matter will
a)
make them move slower
b)
make them move faster
c)
make them stop moving
d)
destroy them
24.
What is it called when the state of matter changes from a liquid to a solid?
a)
Vaporization
b)
Freezing
c)
Condensation
d)
Melting
25.

If you have a sample of water that is 144 °C, what state is it in?

a)

solid

b)

liquid

c)

gas

26.

What happens to particles during changes of state between solid and liquid.

a)

Particles move so fast they break from their fixed position.

b)

Particles melt and become a liquid.

c)

Particles find a circular orbit around an atom's nucleus.

d)

Particles stop vibrating and change into their liquid form.

27.

Which of the following describes the process of freezing?

a)

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

b)

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

c)

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

d)

Freezing occurs when the temperature of a substance drops to 0 degrees Celsius.

28.

What properties do gases have?

a)

definite shape and volume

b)

no definite shape and a definite volume

c)

no definite shape and no definite volume

29.

When thermal energy is increased in a liquid, what change in state is happening?

a)

Melting

b)

Evaporation

c)

Condensation

d)

Freezing

30.

What two changes of state occur when thermal energy is taken away/decreased in a substance?

a)

Freezing

b)

Condensation

c)

Melting

d)

Evaporation

31.

What happens to the arrangement of particles as thermal energy is removed from a substance?

a)

The particles get farther apart.

b)

The particles get closer together.

32.
Which description best matches this particle model?
a)
Closely packed and can't move a lot. 
b)
Particles are close together but can move a little. 
c)
Particles have lots of energy and can move around. 
33.
Which description best matches this particle model?
a)
Closely packed and can't move a lot. 
b)
Particles are close together but can move a little. 
c)
Particles have lots of energy and can move around. 
34.
Which description best matches this particle model?
a)
Closely packed and can't move a lot. 
b)
Particles are close together but can move a little. 
c)
Particles have lots of energy and can move around. 
35.
Which state of matter can be compressed?
a)
Solid
b)
Liquid 
c)
Gas
36.
Which states allow easy flow of particles
a)
Gas and Solid
b)
Gas and Liquid
c)
Solid and Liquid
d)
Gas only
37.
The most common temperature scale used in the world where water freezes at 0 degrees and boils at 100 degrees is called the __________________ scale.
a)
Celsius
b)
Fahrenheit
c)
Pound
d)
Kelvin
38.

Choose the correct statements on effects of heating on matter.

a)

Matter expands

b)

Particles in matter is closer to one another

c)

Particles are further apart from each other

d)

Particles vibrate or move faster

e)

Distance between particles decrease

39.

Choose the correct statements of effects on cooling of matter.

a)

Particles are closer to each other

b)

Matter expands

c)

Matter contracts

d)

Distance between particles decreases

e)

Particles vibrates or move faster

40.

An inflated balloon will _____________ when put inside basin full of ice.

a)

contract

b)

burst

c)

no change

d)

expand

41.

What subatomic particle has a negative charge and is found outside of the nucleus?

a)

Electron

b)

Proton

c)

Nucleus

d)

Neutron

42.

Which subatomic particle has a positive charge and is found inside the nucleus?

a)

Electron

b)

Proton

c)

Neutron

d)

Nucleus

43.

Which subatomic particle has a neutral charge and is found inside the nucleus?

a)

Electrons

b)

Protons

c)

Neutrons

d)

Nucleus

44.

What is the smallest unit of matter that still has the properties of an element?

a)

Atom

b)

Proton

c)

Neutron

d)

Electron

45.
Value representing the number of protons in an element
a)
Atomic Mass
b)
Mass Number
c)
Valence Electrons
d)
Atomic Number
46.
Arrangement of elements organized by atomic number
a)
Electron Cloud 
b)
Periodic Table 
c)
Electron Configuration
d)
None of these
47.

How many protons does Helium (He) have?

a)

1

b)

2

c)

3

d)

4

48.
What is matter composed of?
a)
Atoms
b)
Space
c)
Electrons
d)
Ions
49.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

50.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
51.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
52.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
53.

What does the 6 represent?

a)

Atomic mass

b)

atomic number

c)

chemical symbol

d)

element name

54.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
55.

How many electrons does this atom have?

a)

2

b)

4

c)

6

d)

10

56.
Where is most of the mass in an atom located?
a)
in the nucleus
b)
in the protons
c)
in the neutrons
d)
in the electrons
57.
What electrical charge does a proton have?
a)
+1
b)
0
c)
-1
d)
+2
58.

What mass does a neutron have?

a)

1 amu

b)

0 amu

c)

-1 amu

d)

+2 amu

59.

How many protons does an aluminum atom have?

a)

27

b)

14

c)

40

d)

13

60.

How many electrons does a sodium atom have?

a)

23

b)

11

c)

12

d)

34

61.
Complete the missing label on the diagram.
a)
Neutron
b)
Centre
c)
Nucleus
d)
Sub atomic particle
62.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
63.
Subatomic particle with a charge of 0
a)
neutron
b)
proton
c)
electron
d)
quark
64.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

65.
What are subatomic particles? 
a)
the nucleus 
b)
electron cloud
c)
positive charge
d)
electrons, protons, and neutrons
66.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
67.

How many electrons does the first shell hold?

a)

1

b)

2

c)

4

d)

8

68.

How many electrons can be in the 2nd energy level hold?

a)

1

b)

2

c)

4

d)

8

69.

an arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row

a)

Periodic Table of Elements

b)

Atomic Theory

c)

Isotopes

d)

Subatomic Particles

70.

one or two letters that represent the name of an element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

71.

a row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

72.

The vertical columns of the periodic table are called...

a)

Periods

b)

Families

c)

Chemical Symbols

d)

Groups

73.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
74.

Atoms are mostly...

a)

Tightly packed

b)

Empty space

75.
Which is an electron?
a)
A
b)
B
c)
C
76.
Which is a proton?
a)
A
b)
B
c)
C
77.
Which item on this element square is the chemical symbol?
a)
Copper
b)
29
c)
Cu
d)
63.546
78.
Which is a proton?
a)
A
b)
B
c)
C
79.
Which is a neutron?
a)
A
b)
B
c)
C
80.
Group 2, Period 3
a)
Sodium
b)
Beryllium
c)
Magnesium
d)
Calcium
81.
Group 18, Period 4
a)
Krypton
b)
Argon
c)
Radon
d)
Xenon
82.
Period 3, Group 15
a)
Silicon
b)
Chlorine
c)
Arsenic
d)
Phosphorus
83.
Group 1, Period 4
a)
Calcium
b)
Magnesium
c)
Scandium
d)
Potassium
84.
Period 3, Group 17
a)
Chlorine
b)
Bromine
c)
Argon
d)
Flourine
85.
Period 3, Group 13
a)
Silicon
b)
Gallum
c)
Aluminum
d)
Chlorine
86.
Which of these grouping of elements could have the characteristic of luster (shiny)?
a)
Metal
b)
Nonmetal
c)
metalloids
d)
Both metals and metalloids
87.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
88.
Good conductor of heat
a)
Metal
b)
Nonmetal
89.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
90.
Which of the following is a property of a non-metal?
a)
Conducts electricity and heats well
b)
Can be hammered into thin sheets
c)
Is brittle and breaks easily
d)
Has a shiny, metallic luster
91.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
92.
If a material can easily be drawn into the shape of a wire, it is
a)
Ductile
b)
Magnetic
c)
Malleable
d)
Reactive
93.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
94.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
95.
What is the chemical symbol for the element copper?
a)
co
b)
c
c)
Cu
d)
cu
96.
What is the chemical symbol for the element Nitrogen
a)
Ni
b)
N
c)
No
d)
Nb
97.
What is the chemical symbol for the element Silver
a)
S
b)
Si
c)
Au
d)
Ag
98.
What is the chemical symbol for the element Sodium
a)
Na
b)
So
c)
S
d)
Sd
99.

What is water (H2O)?

a)

Element

b)

Compound

c)

Mixture

100.

What is table salt (NaCl)?

a)

Element

b)

Compound

c)

Mixture

101.

What is salt water?

a)

Element

b)

Compound

c)

Mixture

102.

What is air?

a)

Element

b)

Compound

c)

Mixture

103.

What is a compound?

a)

A substance that is made up of one type of atom and can't be reduced to simpler substances.

b)

A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

c)

A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

104.

What is a mixture?

a)

A substance that is made up of one type of atom and can't be reduced to simpler substances.

b)

A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

c)

A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

105.

What is an element?

a)

A substance that is made up of one type of atom and can't be reduced to simpler substances.

b)

A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

c)

A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

106.

What does this illustrate

a)

Elements

b)

Compunds

c)

Mixture of Elements and Compunds

d)

Mixture of Compounds

107.

What does this pic illustrate?

a)

Element

b)

Mixture of Compunds

c)

Mixture of elemets

d)

Compounds

108.

A compound has different physical properties to the elements that it is formed from.

a)

True

b)

False

109.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
110.
H2O2← ?
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
111.
→2H2O
This number tells how many molecules are in a chemical equation.
a)
coefficient
b)
subscript
c)
compound
d)
element
112.
 2H2O
How many Hydrogen atoms are present?
a)
2
b)
4
c)
1
d)
10
113.
2H2O
How many Oxygen atoms are present?
a)
2
b)
4
c)
1
d)
5
114.
2H2O
How many H2O molecules are present?
a)
1
b)
4
c)
2
d)
8
115.

Which is an example of a diatomic molecule?

a)

NaCl

b)

H20

c)

O2

d)

CO3

116.
Mass, relative density, solubility, color, texture, state of matter, conductivity, etc.
a)
Physical state
b)
Insulators
c)
Physical Properties 
d)
Inferences
117.

What is chemical reactivity?

a)

the ability of a substance to undergo a chemical reaction, either by itself or with other materials

b)

the ability of a substance to undergo a physical change either by itself or with other materials

118.

the ability to be hammered or rolled into thin sheets

a)

magnetism

b)

malleability

c)

ductility

d)

electrical conductivity

119.

Choose the one that is a chemical property

a)

Magnetism

b)

Size

c)

Color

d)

Reactivity with water

120.

Flammability is the ability of a substance to _________

a)

Burn

b)

Transfer heat

c)

Transfer electricity

d)

Cook

121.

What is the outcome of observing a chemical property?

a)

Nothing

b)

A new substance is formed with different properties

c)

NaCl

d)

A rise in thermal conductivity

122.

Which option best describes the difference between a physical and chemical property?

a)

There is no difference between a physical and chemical properties?

b)

Physical properties are usually room temperature but chemical properties are very hot

c)

Observing a chemical property results in the creation of a new substance while observing a physical change does not change the substance

d)

The difference between physical and chemical properties are the states of matter

123.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
124.
A student places a piece of a potato into a container of hydrogen peroxide. One observation the student makes is that bubbles form around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles - 
a)
could show that a gas is forming
b)
always rise to the top of a liquid. 
c)
are almost always perfectly spherical.
d)
usually burst after a few minutes.
125.
Hydrogen peroxide breaks down to form water and oxygen gas. Which observation is evidence that a chemical reaction has occurred?
a)
The mass of the solution remains the same.
b)
 Phase changes are observed.
c)
 The color of the solution remains clear.
d)
The temperature of the solution increases. 
126.
A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?
a)
The level of the substance in the beaker is higher after the other liquid is added.
b)
A yellow solid forms and then settles to the bottom of the beaker.
c)
Small white crystals are left behind in the flask that held the first liquid.
127.
Which of the following is an example that includes evidence of a chemical reaction?
a)
A sample of zinc is placed in water and it settles to the bottom
b)
A solid block of ice is heated and it completely melts into a liquid. 
c)
Sugar that is burned gives off an odor and turns brown and then black.
d)
A tomato is placed into a blender and chopped up into smaller pieces.
128.
A precipitate is a 
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
129.
In the equation,          2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
130.
In a chemical reaction, everything to the right of the arrow is called ______________.
a)
Products
b)
Yields
c)
Molecules
d)
Reactants
131.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
132.

The correct equation for photosynthesis is...

a)

carbon dioxide + oxygen -> glucose + water

b)

Oxygen + water -> glucose + carbon dioxide

c)

glucose + water -> carbon dioxide + oxygen

d)

carbon dioxide + water -> glucose + oxygen

133.

How many iron (Ag) atoms are reactants in this equation?

4Ag + 3O2 → 2Ag2O

a)

4

b)

2

c)

3

d)

0

134.
In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.
a)
reactants
b)
products
c)
neutrals
d)
energizers
135.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HCIO3
d)
H20
136.
Digesting your food is an example of 
a)
chemical change
b)
physical change
137.
A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?
a)
cutting a piece of paper
b)
folding a piece of paper
c)
tearing a piece of paper
d)
burning a piece of paper

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