Photosynthesis

1. The most important difference between plants and animals is that plants can produce food from inorganic materials. The process by which carbohydrates are produced is known as "photosynthesis". It is also the only process by which oxygen is supplied into the air,

2. The process of photosynthesis is very complex consisting of many individual reactions. The conditions necessary for photosynthesis arc light, carbon dioxide, water, some essential nutrients and due tem­perature.

3. Light energy is necessary to transform carbon dioxide and wa­ter into carbohydrates. Water and nutrients required for manufactu­ring carbohydrates come from the soil through the roots. That is why leaves will function well if the plant has a highly developed root system. Carbohydrates produced by plants are the most important source of food for all plants and animals.

4. The main limiting factor for the daily amount of photosynthesis is the duration and intensity of sunlight. The process may also be limi­ted by the amount of carbon dioxide, the supply of water and unfavou­rable temperature.

5. the word (слово) "photosynthesis" consists of two parts, "pho­to*' which is "light" and synthesis which is "building". So, photosynthe­sis is building with light.

XXI. Скажите, почему процесс фотосинтеза так важен для человека. Подтвердите свой ответ соответствующими предложе­ниями из текста.

XXII.Укажите номера абзацев, н которых содержится ответ на вопрос: "От чего зависит хорошее функционирование листьев с точки зрения фотосинтеза?"

LESSON 6

ГРАММАТИКА И ЛЕКСИКА:

1.Независимый причастный оборот.

2.Значения that.

Задание на дом № 1

I. Проработайте в разделе "Грамматика и словообразование" §10,25.

II.Дайте русские эквиваленты слов с суффиксом -ег(ог) (уст­но):

a) higher, longer, larger, later, shorter, smaller;

b)grower, producer, cultivator, supplier, harvester, planter.

III. Выделите независимый причастный оборот в следующих
предложениях. Переведите предложения (устно):

a) 1. Com being a good source of grain and roughage, farmers grow it widely. 2. Winter wheat having been sown in August, its roots can develop well before winter. 3. The soil containing much plant food, the crops will produce high yields.

b) 1. It is necessary to apply nitrogen into the soil, the amount vary­ing with the crop. 2. Cereals are widely grown for obtaining grain, the latter being mainly used food for people and feed for iivestok. 3. There are many root crops grown by man, the most important being sugar beets, carrots and radishes.

IV. В тексте А найдите независимый причастный оборот (4
случая), дайте обоснование своего выбора.

V Переведите текст А (устно).

Text А

Дата добавления: 2015-11-14