t of volume - вес на еденицу объема like grey cast iron - подобно серому чугуну under heavy hydraulic pressure - под большим гидравлическим давлением
whereas - в то время, как
most metals expand on heating - большинство металлов расширяются при нагревании
silvery white or grey in colour - серебристо-белого или серого цвета
the only yellow one - единственный желтый металл
copper-base alloys - сплавы с медной основой
the true colour and lustre - истинный цвет и блеск
by a coating of oxide - покрытием окисла
EXERCISES
Answer the questions.
Name the main physical properties of metals and alloys.
What does the boiling point of a substance depend on?
When do most metals extend?
What is the difference between liquid and solid metal?
What metals possess considerable magnetism at room temperature?
Match the term with its definition.
1) porosity
2) composition
3) melting point
4) boiling point
5) electrical conductivity
6) density
a) the temperature at which a metal melts
b) the electrical conducting power of a unit of cross sectional area
c) the quality of containing pores is lack of denseness
d) the temperature at which the metal boils under normal atmospheric pressure
e) the manner of arrangement of metal atoms as to geometric form in solid crystals
f) weight per unit of volume
Find in the text sentences containing the following words and translate them into Russian.
solid crystals
composition
surface
cooling
electrical resistance
lightweight metals
to leak
resistivity
the solidified mass
denseness
Find 13 words on the topic in the crossword-puzzle and give their
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