# Materials Exercises

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```Technology 1: chapter 1 MATERIALS exercise book
Exercise book
1.* Can you tell the origin of a wool sweater? and a knife? Find out!
Place the following objects in their corresponding group according to whether they are
made out of materials of vegetable (V), animal (A) or mineral (M) origin.
Objects:
wool sweater
metal chair
wooden chair
clay object
a glass
leather shoes
paper roll
book
wooden spoon
pot
wooden object
knife
2.** I will show you some objects. Can you tell me their degree of processing?
Place these groups of three materials in order according to their degree of processing.
Place the raw material first, then the half-processed product, and finally the consumer
goods.
Objects in order:
sheep
ball of wool
wool sweater
cotton plant
cotton string
cotton t-shirt
petroleum
plastic bar
plastic bottle
mineral
metal bar
screws
3.** Objects can be made out of different materials, test your knowledge!
Match each object with the material it’s made out of.
Objects
Bicycle
Parquet
Power cable
Bicycle wheel
Credit card
Material
aluminium
copper
plastic
wood
rubber
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Technology 1: chapter 1 MATERIALS exercise book
4.** The properties of materials
Match the pictures with the properties
Activity
Float
Boil
Plug in an electrical appliance
Scratch glass
Create a clay mold
Property
plasticity
electrical conductivity
thermal conductivity
hardness
density
5.*** Which is which?
Which material are we talking about? Make the necessary questions to find out which
material we are referring to.
WOOD
COPPER
PLASTIC
IRON
Would it float on water?
Is it easily workable?
Does it absorb water well?
Is it a good thermal conductor?
Is it a good electrical conductor?
Does it melt at high
temperatures?
Is it a ductile material?
Does it oxidize easily?
6.*** Materials and electricity, don’t get shocked!
Classify the following materials according to their electrical properties (insulator or
conductor). Be careful, don’t get shocked!
Object
Property
Wood
Plastic
Copper
Iron
Water
Edison
Glass
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Technology 1: chapter 1 MATERIALS exercise book
7.*** Density of materials
Element
ALUMINIUM
COPPER
ZINC
WOOD
MARBLE
Mass
200 g
475 g
475 g
15 g
125 g
Volume
74 cm3
49 cm3
42 cm3
Density
8.9 g/cm3
7.1 g/cm3
0.75 g/cm3
2.6 g/cm3
8.** From the hardest to the softest
Place the following materials in order according to their hardness:
Materials:
Chalk
Metal
Wood
Glass
Diamond
9.** Which plastic is our washing machine made out of? Find out!
Relate each object with the kind of plastic it’s usually made out of.
Object
bleach bottle
Washing-machine
Yoghurt
button
umbrella
vinyl
glass
fishing line
canoe
Plastic
nylon
polystyrene
polypropylene
unsaturated polyester resins
polyester
methacrylate
polyvinyl chloride
polyethylene
melamine resin
10.** Identify each part of the tree trunk.
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Technology 1: chapter 1 MATERIALS exercise book
11.** Identify each part of the blast furnace in the following diagram.
12.** Identify each stage of the mechanical plastic recycling process
13.*** Test yourself!
a. The chemical properties of a material indicate:
1. their capacity to endure plagues
2. the possible reactions to other materials
3. its own properties
b. The ratio between the mass and volume of a material is called:
1. hardness
2. density
3. hygroscopicity
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Technology 1: chapter 1 MATERIALS exercise book
c. When a material is susceptible to rotting, we say it is:
2. hygroscopic
3. porous
d. What does the grain on wood depend on?
1. on the growth rings, that is, on the age of the tree
2. on the height of the trunk
3. on the length of the fibres
e. What is the aim of drying wood?
1. to make it easier to work with
2. to dry out the water it contains so as to avoid its rotting too quickly
3. to harden it
f. Which wood is the hardest?
1. walnut
2. black poplar
3. aleppo pine
g. Why is recycling beneficial?
1. we can make cheaper paper
2. we reduce tree felling and lower the energetic cost of production
3. we obtain a paper of an extremely high quality
h. What is the name of the mineral from which we extract a metal?
1. ore
2. native mineral
3. tailings
i. Which one of the following metals is ferric?
1. copper
2. aluminium
3. steel
j. Which one out of the following plastics is very difficult to recycle?
1. polyethylene
2. melamine resin
3. polyvinyl chloride
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Technology 1: chapter 1 MATERIALS exercise book
14.** Classify the following properties of materials
15.* Classify the following materials according to whether they are good or poor
thermal conductors (XML)
Good thermal conductor
Poor thermal conductor
Iron, aluminium, cork, expanded polystyrene,ceramic, wood
16.*** What should the expansion joint measure?
17.* Classify into plastic or elastic materials.
Plastic
Elastic
Wet clay, Rubber, latex, modelling clay
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Technology 1: chapter 1 MATERIALS exercise book
18.* Classify into tough or fragile materials.
Tough
Fragile
Rubber, iron wire
Ceramic, glass
19.* Classify into native or non native metals.
Native
Non natives
Gold , silver, lead, aluminium copper, iron,
20.* Classify into ferric or non ferric materials.
ferric
non ferric
pyrite, aluminium, tin, magnetite, copper, siderite
21.** What kind of steel is it made out of?
mild steel- tool steel - hard steel - stainless steel
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