Answer the following questions:

1. What is oil?

2. What happens with oil after it is removed from the ground?

3. Why is oil particularly useful as a fuel?

4. What types of plastics are there?

Choose the right statement

1. a) Oil is particularly useful as a fuel because of its low energy density.

b) Oil is particularly useful as a fuel because of its high energy density.

c) Lubricating oil is particularly useful as a fuel because of its low energy density.

2. a) Plastics are usually heavy and strong and do not rust.

b) Plastics are usually light and strong and can rust.

c) Plastics are usually light and strong and do not rust.

3. a) You can't reheat and melt thermoplastics again and again

b) You can reheat and melt thermoplastics again and again

c) You can't reheat and melt thermosets again and again.

4. a) Synthetic fibres are often water-resistant and do not stretch.

b) Oil and petrol can damage synthetic fibres.

c) Synthetic fibres aren't often water-resistant and do not stretch

4. Make up 5 types of questions to these sentences:

1. Oil is the liquid fossil fuel.

2. It remains liquid at very low temperatures.

Дата добавления: 2019-02-22; просмотров: 248; Мы поможем в написании вашей работы!

Поделиться с друзьями: