Translate the following sentences, pay attention to the meanings “ also”

1. So far, electrons have been treated as particles, but it can be shown that electrons have a wave nature also. 2. The warm air heats air above it. Also, the warm air will rise, and going to a region where the pressure is less it will expend. 3. While, strontium batteries have a very long lifetime, they yield a rather low number of watt-hours per pound. Also, nothing can be done to alter the rate at which the isotope released energy.

18. Translate into Ukrainian, pay attention to the preposition “by”:

1. Many substances are prepared by chemical methods. 2. The mechanical energy of a waterfall can be transformed into electrical energy by means wheel and dynamo. 3. The combining weight of elements can be found experimentally by determining how many grams of the element unite with 8 grams of oxygen.

19. Form the words using the following suffixes and translate them:

Adjectives: -ic: atom, electron, magnet, cosm(os), realist

-al: univers(e), cultur(e), spectr(um), electric

-ive to attrect, to great(e), decis(ion),to conduct, to act

-able: to vary, to change, to approach, to achiev(e), to suit, to compar(e)

-ible: to convert, compress, exhaust

-ful: success, doubt, use, wonder, peace, beauty

-less: help, doubt, change, home, meaning

-y: sun, hill, rain, wind

-ous: tocontinu(e), to vary, danger

Adverbs: -ly: extreme, initial, perfect, final, excelent, rough, instant, swift, equal, simultaneous,

comparative, exact, large, hard, high, short.

LESSON 73

PROTECTION OF AIR

1. Read and translate the following international words:

atmosphere n, troposphere n, stratosphere n, exosphere n, ultraviolet a.

2. Remember the pronunciation and translation of the following words:

breathe – дихати

envelop – оточувати, обкутувати

harmful – шкідливий, згубний

originate-відбуватися, брати початок

altitude – висота

3. Name the verbs from which the following nouns were formed and tanslate them: protaction, variation, container, development, observation, radiation, reflection, location, composition.

4. Check your knowledge the following words with the help of terminological dictionary:

vapour, absorption, dispersal, density, mixture, admixture.

5. Read the text and give the main idea: