Определите, какой частью речи является подчеркнутое слово.

1. Some rocks are formed from the remains of plants.

2. The origin of life on Earth remains one of the most interesting problems in modern science.

3. A glacier deposits its loads on land or in the sea.

4. Rock deposits may be stratified.

5. Metamorphism changes the original characteristics of rocks.

6. Temperature and pressure cause great changes in the chemical composition of rocks.

7. In some places the wind forms sand dunes.

8. Sand dunes may be of different forms.

9. Geological processes shape the lands.

10. This rock is of irregular shape.

Ex.9.

Выберите нужный по смыслу вариант из приведенных в скобках.

1. The real difference between the centre of Africa and the centre of America is that in the (former/formerly) water is water and in the (later/latter) water is ice.

2. In general, waves are of two types: swell waves and storm waves. Both are generated by the wind but the (letter/latter) more directly than the (farmer/former).

3. The earth warmed up and cooled off several times. In comparison to some (former/formal) eras of geologic history today we live in one of the “ice age”.

4. It was (formally/formerly) supposed that the entire interior of the Earth was liquid.

5. Molten magma contains large quantities of both oxygen and hydrogen. In cooling they combine to form water. The (later/latter) is an extremely active agent.

Ex.10.

Вставьте нужные предлоги.

1. All rocks are composed ___ minerals.

2. Minerals are ___ great importance ___ the geologists.

3. The oceanic crust is made up ___ dark rocks.

4. Any material which was formed ___ liquid rock is called igneous rock.

5. This area is now covered ___ sedimentary rock.

6. This layer of sedimentary rock lies ___ the igneous and metamorphic rocks of the earth’s crust.

7. The word “metamorphic” comes ___ two Greek words.

Ex.11.

Дополните следующие предложения нужными по смыслу словами из предложенных в рамке.

1. It is believed that some of the molten material cooled ______ the crust.

2. The wind carried away particles of eroded rock and set them down in layers ______ on dry land ______ under the water.

3. The continental crust ______ light rocks, the oceanic crust ______ dark rocks.

4. Minerals are ______ of the earth’s crust.

5. Rocks are classified on the basis of their ______.

6. The term “rock” ______ all the solid constituents of the earth’s surface.

7. The thickness of the earth’s crust under the oceans is ______ than under the continents.

Ex.12.

Выберите вариант, соответствующий выделенному слову.

1) In some places много carbon dioxide (CO₂) escapes from the earth.

a. many

b. much

c. more

d. most

2) In the world there are много amazing phenomena.

a. many

b. most

c. much

d. more

3) There is very мало free hydrogen present in the earth now.

a. few

b. a few

c. a little

d. little

4) In несколько places Antarctica extends north of the Antarctic Circle.

a. few

b. a few

c. little

d. a little

5) To understand the geological history of the country we must know немного of world geology.

a. few

b. a few

c. little

d. a little

6) There are мало rivers in desert regions.

a. few

b. a few

c. little

d. a little

7) The Antarctica is composed of a continent and много small islands.

a. much

b. many

c. most

d. more

8) Although there is много snow in Antarctica, there is almost no fresh water.

a. much

b. more

c. most

d. many

Ex.13.