Fill in each blank with the correct word from the lesson.

1. Nylon was the first fully _______ fibre, invented in 1935, and was famously used for women's stockings.
2. In the twentieth century, chemists discovered how to make _______ entirely from chemicals — without any plants or animals.
3. These synthetic fibres are stronger, cheaper, and more durable than most natural fibres — but they come with serious env_______mental costs.
4. Starting from crude oil, chemists break petroleum into smaller _______s, then chemically join them into enormously long chains.
5. Today polyester is the most produced textile _______ in the world, making up more than half of all fabric.

Choose the best option for each question.

1. What are synthetic fibres made from?
   a) Plant stemsb) Animal fleecec) Petrochemicals from crude oild) Tree bark
2. What is a polymer?
   a) A type of natural fibreb) A long chain of repeating chemical unitsc) A dye used in fabricd) A method of weaving cloth
3. What environmental problem does washing synthetic clothes cause?
   a) It wastes too much waterb) It releases microplastics into waterwaysc) It bleaches riversd) It produces carbon dioxide

Write T for True or F for False in the brackets.

1. Petrochemicals from crude oil is one of the key concepts in the lesson on Synthetic Fibres.
2. Plant stems is the main topic of this lesson.
3. A long chain of repeating chemical units is one of the key concepts in the lesson on Synthetic Fibres.
4. A type of natural fibre is the main topic of this lesson.

1. In your own words, explain what Synthetic Fibres means.
2. List two things you learned from this lesson on Synthetic Fibres.