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Listen to the recording once more. For questions 6-15, complete the notes with the missing information
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6.
| Weathering is the process of rock |
7.
| Temperature changes in deserts and mountains are |
8.
| As a result of expansion and contraction, rocks |
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9.
| Finally rocks transform into |
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10.
| When water freezes it increases |
11.
| Rock pieces have varied |
12.
| Physical weathering is of rocks due to heat and cold. |
13.
| Chemical weathering means the influence of water, carbon dioxide |
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14.
| Water directs to more complex. |
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15.
| The action of plants is very |
4.2 Listen to the following lecture- Minerals: rock components. Fill in the spaces with the missing information. You will hear the lecture twice.
| Some rocks can be seen with the naked eye. These particles are (1) _______. These are (2) _______ ______, which have been inorganically formed. They have definite (3) ________ _________- and definite (4)_________ _________. When a rock forms, the chemicals organize themselves into different minerals. There are hundreds of different minerals, but some are more (5) __________ than others. Every rock is made up of a (6) __________ of different minerals. We can divide minerals into (7)_________ broad categories: 1. (8)________________ 2. (9) _____________ (10)_______ is the most common chemical component of the Earth. The most common rock-forming minerals are (11) _________. The simplest mineral of this type is (12) ___________. | It is pure (13) _________. There are metallic elements combined with silica. An example is magnesium-iron silicate called (14) ________. It is the most common mineral of the (15) ___________ crust. The (16) _____crust is rich in (17) ______, so it’s also rich in aluminum silicate, called (18) ________. Compounds containing carbon are called (19) ________. The most important is (20) _________. It is an (21) _________ mineral, because it’s affected by (22) ___________. The silicates contain (23) ________. Because of their chemical nature, these metals are impossible to remove. (24)_______are metals that contain oxygen and are important ore minerals. Examples are (25) _________ and (26) ________. A metal combined with sulfur forms a (27) ________. These include (28) _______ and (29) _________. |
Дата публикования: 2014-11-03; Прочитано: 893 | Нарушение авторского права страницы