3 Part One. The Predicate

Section II
Mashq 1. Quyidagi xalqaro so’zlar nimani anglatadi?:

component, ion, metal, ocean, complex, organic, organism, course, plasma, extensively, correlate, universal, barium, sulphate, milligram, litre, quartz, extremely, cellulose

Mashq 2. Tanlangan so’zlarning ma’nosini vaziyati bo’yicha aniqlang.

1. The abilityof water to dissolve many substances is one of its unique properties. 2. Heat and light are usually evolvedduring combustion. 3. A substance that is dissolved is called a solute.4. Water is widelyused both in industry and in laboratory. 5. If a solution of NaCl is evaporated to dryness,white crystals appear in the glass. 6. If a solution is saturated,no more solute can be dissolved.

Teksga so’zlar:

environment — окружающая среда; tissue — ткань; fluid — жидкость; blood — кровь; cell — клетка; imperceptible — незаметный, незначительный; vessel — сосуд; eventually — в конце концов; merely — просто; exceedingly — чрезвычайно

Text 24 В

Matnni o’qing (o’qish vaqti — 4 daqiqa).

Water
One of the most striking properties of water is its ability to dissolve many substances, forming aqueous solutions.Solutions are very important kinds of matter — important for industry and for life. The ocean is an aqueous solution that contains thousands of components: ions of the metals and non-metals, complex organic ions, many different organic substances. It was in this solution that the first living organisms developed, and it was from it that they obtained the ions and molecules needed for their growth and life. In the course of time organisms that were evolved could leave this aqueous environment, and move out onto the land and into the air. They achieved this ability by carrying the aqueous solution with them, as tissue fluid, blood plasma, and intraccllular fluids containing the necessary supply of ions and molccules.

The properties of solution have been extensively studied, and it has been found that they can be correlated in large part by some simple laws.

Water not only is the most widely used of all solvents, but also, of all liquids, it most nearly approaches being the “universal solvent”. Every substance is probably soluble in water to some extent, although in many eases the solubility is so small that it is almost impcrscptiblc. Thus, a saturated solution of barium sulphate contains less than a quarter of a milligram of solute per litre, and the solubility of silicon dioxide (quartz)— is even smaller than this. Yet, water that is allowed to remain for a long time in a quartz vessel must eventually become saturated with quartz; a saturated solution of this substance is so extremely dilute, however, that many litres of it would have to be evaporated to dryness in order to yield a visible residue. Such substances as barium sulphate, silver chloride, quartz, glass, mercury, and cellulose are usually considered as “insoluble” in water; but this term, it must be remembered, is merely a relative one, and it would be more accurate to say that their solubility is exceedingly small.
Mashq 3. Matnning asosiy tarkibini bir nechta jumlalarda ko’rsating.

Mashq 4. Matnning rejasini tuzing.

Mashq 5. Jumlalarni o’qing va matn mazmuniga mos kelishini ayting. Agar yo’q bo’lsa, ularni tuzating.

1. Water can dissolve a great number of substances. 2. Solutions are important in industry, but not in life. 3. A lot of components are dissolved in the ocean water. 4. The first living organisms developed in water and on the land and then moved into the air. 5. There are no laws common to all the solutions and the properties of cach solution are studied separately.6. Every substance is soluble in water to some extent.

Mashq 6. Amaliy erimaydigan moddalar suvda qanday harakat qilishini tasvirlaydigan matnni toping va o’zbek tilidagi jumlalarga tarjima qiling.