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IELTS Trek

The history of glass

Part 4, Short answer questions. IELTS Trek Practice Book 1, Test 2 (2026), set 1 of 1.

Part 4 recording

Test mode: the recording plays once, like the real test.

How to do Short answer questions

Answer each question with a few words from the text or recording.

  1. 1 Check the word limit, for example NO MORE THAN TWO WORDS.
  2. 2 Predict the kind of word you need: a noun, a number, an adjective.
  3. 3 Use the exact words from the text and spell them correctly.

Questions 37 to 40

Answer the questions below.
Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
37

In which decade was the float process invented?

Correct Answer: (you wrote )

38

What liquid metal is used in the float process?

Correct Answer: (you wrote )

39

What percentage of flat glass is made by the float process today?

Correct Answer: (you wrote )

40

Apart from material, what else does recycling glass save?

Correct Answer: (you wrote )

/ answered,

/

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Answers are highlighted in the transcript.