Text 7В Germination
1. When environmental conditions are favourable a young dormant plant begins to grow. This change from a dormant condition (состояние) to that of activity is known as germination.
2. Seeds of various kinds of plants require specific conditions for germination. These conditions include adequate moisture, due temperature and proper amount of air. Seeds of a very few plants require light as well. Unless all these conditions are provided, the seeds will not germinate properly.
3. The most favourable temperature for germination varies with the crop. Some seeds require high temperature for good germination, others will germinate best at lower temperature. Oats, for example, germinate at a much lower temperature than corn.
4. When the seed is sown in a firm, moist seedbed, quick and uniform germination is obtained, provided other conditions are favourable. A firm seedbed is desired because under such conditions the seed and soil come into closer (тесный) contact and moisture becomes available to the seed. Too much moisture is undesirable because it may reduce germination due to deficiency of air.
5. Air is needed for germination, for oxygen is necessary for certain chemical reactions that take place in the plant food stored in the seed.
8. Specify the statements which do not match the content of the text. Explain your choice in Russian and/or in English .
1. Seeds do not require light for germination.
2. Any seed begins germinating when conditions are favourable.
3. Germinating seeds require more moisture than air.
9. Based on the content of text B say under what conditions seeds will not germinate (in Russian or in English).
Listening and Speaking Focus
a) Watch the video and answer the following questions:
1. What is the process of germination controlled by?
2. What are the four factors of germination?
3. What grows after the seed coat becomes soft and swells?
4. What grows when the cotyledon falls off?
b) Describe the process of photosynthesis.
https://youtu.be/RlGjjwphZas
UNIT 8. SOIL
| In this unit you will learn: | Grammar focus: - The infinitive as a subject and an adverbial modifier of aim. - Coinstruction for + noun (pronoun) + infinitive. - Correlative pair “the… the…”. Vocabulary focus Reading and comprehension focus: - Text A. Soil. - Text B. Soil water. Listening and speaking focus |
Grammar Focus
| The infinitive
|