IELTS 19 Academic · Test 3

Listening · Part 4

Mock mode: in the real test you hear the recording once.

Questions 31–40
Complete the notes below.
Write ONE WORD ONLY for each answer.

Highlight and auto-scroll with the audio

0:00 Part 4. You will hear part of a lecture by Professor Clara Weiss on the story of glass. First, you have some time to look at questions 31 to 40.
0:20 Now listen carefully and answer questions 31 to 40.
0:25 Lecturer: Good afternoon. Today's lecture is about the story of glass.
0:31 Lecturer: Glass is made mainly from heated sand.
0:34 Lecturer: The first glass objects were probably small beads.
0:37 Lecturer: Glassblowing made it possible to produce cheap bottles.
0:41 Lecturer: Medieval churches used coloured glass to tell stories.
0:45 Lecturer: Flat window glass was once very expensive.
0:49 Lecturer: The invention of lenses led to the first telescopes.
0:53 Lecturer: Today, thin glass fibres carry internet signals.
0:57 Lecturer: Smartphone screens use glass that has been chemically strengthened.
1:02 Lecturer: Glass can be recycled again and again without losing quality.
1:06 Lecturer: Architects now use glass that changes tint in sunlight.
1:10 Lecturer: That's all for today. Next week, we'll look at some case studies in more detail.
1:16 That is the end of Part 4. You now have some time to check your answers to Part 4.
1:32 That is the end of the listening test.