English Across The Curriculum
Atoms and Elements - Exercises Key
Match
3
the
Words
with the definitions
A
chlorine
B
something that is not mixed with anything
else
B
pure
F
different forms of an element
C
ore
H
to make something shiny and bright
D
jewellery
J
red substance in your body that has iron in it
and carries oxygen
E
boil
M
made up of two or more elements
F
isotope
A
a greenish, yellow gas with a strong smell
G
fertilizer
L
something that you put into the soil to make
plants grow
H
polish
Q
the middle part of an atom with protons and
neutrons
I
acid
C
rock that has metal in it
J
haemoglobin
E
when a liquid becomes hot enough so that it
turns into gas
K
limestone
O
to breathe in something
L
fertilizer
P
when gas becomes liquid
M
compound
G
something that you put into the soil to make
plants grow
N
power plant
D
small things that you wear that have gold and
silver in them
O
inhale
N
building where electricity is produced
P
condense
K
a kind of rock that has calcium in it
Q
nucleus
I
strong liquid that can burn holes in materials
or damage your skin
English Across The Curriculum
Atoms and Elements - Exercises Key
break
4Fill
in the blanks with the words from the box
!
charge
electrons
The nucleus is in the middle of an atom . It is made up of protons and neutrons. It has almost all of an atom’s mass.
mass
Electrons fly around in an atom very quickly. They move in paths called
shells. The inner path can hold only two electrons, the outer paths up to 32.
negative
nucleus
Each proton has a positive electrical charge. Electrons have a negative
orbit
charge.
The energy of the nucleus keeps the electrons in its orbit. But they often
protons
want to break away from the atom. Sometimes one electron is shared by
shared
two different atoms.
5Fill
energy
in the blanks with the words from the box
shells
!
bicycles
carbon dioxide
Carbon is one of the most important elements on earth. All living creatures
have carbon in their bodies. Carbon get together with other elements and
can build long chains. Carbon and hydrogen are , for example in petroleum
and gas. Carbon dioxide is in the air that we breathe out.
chains
consist
creatures
crust
Pure carbon cannot be found very often. Diamonds consist of carbon in its
elements
purest form. They are formed under the earth’s crust at very high tempera-
graphite
ture and under a lot of pressure. Industries use diamonds to make drilling
heads for oilfields.
Graphite is another form of carbon. It is very light and used for pencils, tennis rackets and bicycles.
hydrogen
light
oilfields
pressure
English Across The Curriculum
Atoms and Elements - Exercises Key
6True
or
False ?
T
F

Electrons do not have an electric charge.
Electrons that move around in the inner shells travel fast.

The atomic number tells you how many protons an atom has.


All elements can be found in nature.
Sometimes elements have more neutrons than protons.

Ions are atoms that gain or lose electrons.

When you split an atom a lot of energy is created.

Compounds are atoms that have the same nucleus.

Organic compounds always have hydrogen atoms in them.

Isotopes of an element always have the same number of protons.
8Find
the correct answers
1a - 2c - 3b - 4a - 5b - 6a - 7c - 8c - 9b - 10b - 11c - 12 a
- 13a - 14b - 15a - 16c

English Across The Curriculum
Atoms and Elements - Exercises Key
9
Crossword - Find
1
the right elements
C
O
P
P
E
7
U R A
2
C
A
R
B
O
N I
3
!
4
C H L O R I N E
E
L
5
6
N I T R O G E N
U
X
U M
Y
8
G O L D
9
I
E
10
11
L
H Y D R O G E N
E
O
12
A L U M I N I U M
D
Created with EclipseCrossword — www.eclipsecrossword.com
10 Crossword 1
F
4
5
D
E
O R G
I
A
7
I
A
T
9
S
M
U
N
O
E
R
U
11
T
T
E L E C T
O
E
L
13
14
P A R T I C L E
E
O
U
M
S
P
O
18
F U E L
N
19
C O R R O D E
2
3
G
F
6
A N I C
R
I
S
E
8
N
S
L
A
I
A
C
10
O R B I T
12
R O N
O
O
A
R
R
Y
A
15
16
P E T R O L
O
I
R
Q
17
A L L O Y
U
I
D
Created with EclipseCrossword — www.eclipsecrossword.com
English Across The Curriculum
Atoms and Elements - Exercises Key
11 What
do you associate with these pictures?
helium
Fill
in from the box below
hydrogen
carbon
gold
iron
aluminium
Oxygen
chlorine
Uranium
aluminium
gold
iron
carbon
helium
oxygen
chlorine
hydrogen
uranium
!
English Across The Curriculum
Atoms and Elements - Exercises Key
12 Match A Part
in
A with
a
Part
in
B
to form a complete sentence
Hydrocarbons are compounds that only have hydrogen and carbon in them.
Helium is a light gas that is used to fill balloons.
Nitrogen is a colourless gas that makes up 78 % of the earth’s atmosphere.
Iron ore is melted at very high temperature.
The industry uses diamonds to cut or polish other hard objects.
Chlorine is used to make water in swimming pools cleaner.
About 8 % of the earth’s crust is made up of aluminium.
Gold gets into rivers where it sinks to the bottom.
Bauxite is found in rocks of subtropical and tropical countries.
Iron helps our bodies create haemoglobin.
!