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Paper 2
Topic 10: Using Resources
10.3 Using materials
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Created by
Nithusiga Selvamukunthan
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Cards (31)
What is
corrosion
?
Destruction
of
materials
by
chemical
reactions
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What two
elements
are necessary for
iron
to
rust
?
Air
and
water
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How can
corrosion
be
prevented
?
By
applying
a
protective
coating
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What are some methods of
applying
protective
coatings
?
Greasing
,
painting
, or
electroplating
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What protects
aluminium
from
corrosion
?
An
oxide
coating
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What is
sacrificial
protection
in
corrosion
prevention
?
Using a
more
reactive
metal
to
protect
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What metal is
commonly
used
to
galvanise
iron
?
Zinc
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How does
sacrificial
protection
work?
More
reactive
metal
donates
electrons
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What are
most
metals
used in
everyday
applications
?
Alloys
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Why are
pure
metals
like
copper
too
soft
for
everyday
use
?
They
lack
hardness
for
practical
applications
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What is
gold
in
jewellery
usually an
alloy
with?
Silver
,
copper
, and
zinc
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What is
bronze
an
alloy
of?
Copper
and
tin
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What is
brass
an
alloy
of?
Copper
and
zinc
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What are
steels
made from?
Mixtures
of
carbon
and
iron
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How can
alloys
be
designed
?
To meet
specific
uses
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What are low-carbon
steels
used for?
Sheeting
due to
malleability
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What are high-carbon
steels
used for?
Cutting
tools
due to
hardness
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What are
stainless
steels
resistant
to?
Corrosion
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What are
aluminium
alloys
used for?
Aircraft
due to
low
density
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What is soda-lime
glass
made from?
Sand
,
sodium
carbonate
, and
limestone
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What is
borosilicate
glass
made from?
Sand
and
boron
trioxide
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What are
clay
ceramics
made from?
Shaping
wet
clay
and
heating
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What do the properties of
polymers
depend on?
Monomers
and
production
conditions
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What are the
differences
between
low
density
and
high
density
polyethene
?
Reaction
conditions
and
catalysts
used
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Why does
low
density
polyethene
have a
low
melting
point
?
Weaker
forces
of
attraction
between
chains
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Why does
high
density
polyethene
have a
higher
melting
point
?
Higher
forces
of
attraction
between
chains
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What are
thermosoftening
polymers
made of?
Individual
,
tangled
polymer
chains
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What happens to
thermosoftening
polymers
when
heated
?
They
melt
due to
weak
forces
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What are
thermosetting
polymers
characterized by?
Cross-linked
polymer
chains
that do
not
melt
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What are most
composites
made of?
A
matrix
surrounding
reinforcing
fibres
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What is a property of
bricks
and
pottery
?
Very
hard
but
very
brittle
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