Exercise II. Read about the properties of materials and complete the sentences
with the examples. Познакомьтесь со свойствами материалов и дополните
фразы примерами.

A brittle material breaks easily: eg. glass, ... .
A tough material does not break easily: eg. steel … .

A hard material is difficult to scratch: eg. glass, … .
A soft material is easy to scratch: eg. chalk, ... .

2

A flexible material bends easily: eg. rubber, … .
A rigid material does not bend easily: eg. concrete, … .

Some materials have a smooth surface; they produce little friction
when they are rubbed: eg. ice, … .

Some materials have a rough surface and produce a lot of friction: eg.
sandpaper, … .

Materials which are soluble in water dissolve easily: eg. salt, …

Materials which are insoluble do not dissolve: eg. glass, … .

Combustible materials burn easily: eg. wood, … .

Non-combustible materials do not burn: eg. stone, … .