5. Подберите эквиваленты к словосочетаниям, обозначенным цифрами

naturally occurring substances	покрытие внешней поверхности здания
external surface covering	ограниченный объем
clear windows	общая однородность
limited scale	вещества природного происхождения
general uniformity	прозрачные стекла

6. Сопоставьте глаголы и их значения

1) to use	a) to place something upon or over, so as to protect it
2) to cut	b) to combine or blend into one mass or mixture
3) to mix	c) to separate into parts with or as if with a sharp-edged instrument
4) to provide	d) to put into service or apply for a purpose; employ
5) to cover	e) to make available, or supply

7. Опровергните высказывание

1) Concrete has a high tensile strength.

2) Synthetic materials are made at the construction site only.

3) Rock is a very dense material so it gives no protection.

4) Concrete is a composite building material made from the combination of man-made products.

5) The term plastics covers a range of natural materials.

6) Glass is strong, flexible, and if treated well lasts a long time.

8. Соотнесите фрагменты предложения так, чтобы смысл высказывания не был нарушен

Many natural substances, such as	were used to hold the stones together
Natural building materials are	clay, sand, wood and rocks have been used to construct buildings.
Different forms of mortar	made from the combination of aggregate and a binder.
Concrete is a composite building material	is light weight, easily shaped and an excellent insulator.
Synthetic polystyrene or polyurethane foam	those that are unprocessed or minimally processed by industry

9. Пользуясь содержанием текста, ответьте на вопросы

1. What is building material?

2. How can all building materials be categorized?

3. How are bricks made?

4. What is metal used in construction for?

5. What does the term plastics mean?

6. What naturally occurring and man-made building materials do you know?

7. Why is concrete the predominant building material in this modern age?

8. Are there any environmental problems of using and producing building materials?

10. А) Составьте устное высказывание об основных строительных материалах

б) Обсудите в парах свойства различных строительных материалов.

UNIT 5

BUILDING SCIENCE

1. Подберите русские эквиваленты следующим словам, содержащим интернациональные корни

Focus, analysis, control, optimize, reaction, hyperstatic, mechanical, geometrical skeleton, calculation, economy, esthetic, combine, neutralize, deformation, equilibrium, gravitational.