Task 3. Complete the sentences using the words in the box. You will need to use one word twice.
compression, deformation, elongation, extension, tension
1. A stretching force is called
2. A crushing force is called
3. Extension is also called
4. Tension causes .. or
5. Tension or compression cause
Task 4. Match the tivo parts to make correct sentences.
1. If a material is stiff
2. If a material is brittle
-
3. If a material is plastic
4. If a material yields
5. If a material fractures
6. If a material is elastically deformed ...
a) it is malleable and/or ductile.
b) it has low elasticity and low tensile strength.
c) it has low elasticity and high tensile strength.
d) it has been extended to a point before its elastic limit.
e) it has been loaded beyond its ultimate tensile strength.
1) it has been significantly plastically deformed, but not broken.
Example: She a student. She’s a teacher.
B isn’t
1 We to France last summer.
C went
2 I always toast for breakfast.
B have
3 your brother play the guitar?
A Does
4 My mum doesn’t like to work.
B driving
5 They TV at the moment.
A ’re watching
6 I to Rome.
B ’ve never been
7 What tomorrow afternoon?
B are you going to do
8 We to Rome and then we drove to Florence.
A flew
9 She to school today because she’s ill.
A doesn’t go
10 I at the moment because I’m on holiday.
A ’m not studying
11 Have you ever Japanese food?
B eaten
12 They pizza. They had pasta.
A didn’t have
13 Who your favourite actors?
B are
14 How often to the cinema?
B do you go
15 They early on Sundays.
C don’t get up
16 This is interesting book. Have you read it?
B an
17 I often go shopping the weekend.
C at
18 The children played in the garden.
C happily
19 These shoes aren’t . Look! They’re too small.
C mine
20 there any biscuits?
A Are
21 She hardly travels abroad.
B ever
22 Paul left work an hour .
C ago
23 How chocolate do you eat?
B much
24 This is film I’ve ever seen.
A the best
25 I’m younger my sister.
B than