Занятие 13

Повторение изученного материала по теме 1.3.

Проведение лексико-грамматической итоговой работы

Тема 1.4.

Принципы эволюции.

История возникновения жизни на Земле.

Занятие 14

Этапы занятия:

I. Изучающее чтение.

Задание 1. Прочтите слова Vocabulary на стр 27 учебника 1. Выучите их

Задание 2. Прочтите текст А “The theory of evolution”на стр 27 учебника 1.

Задание 3. Изучите содержание Vocabulary notes на стр 28-29

Задание 4. Выполните упр 1, 3 на стр 29

II. Работа над грамматикой

Прилагательные и наречия.

Задание 1. Прочтите информацию на стр 122-123 учебника 1

Задание 2. Выполните упр 1,2 на стр 124

III. Перевод текста со словарём

Переведите текст Charles Darwin на стр 33 учебника 1

Занятие 15

Этапы занятия:

1. Работа над лексикой

Задание 1. Выполните упражнения 4, 7, 8,9,10 на стр 30-31 учебника 1.

Задание 2. Перескажите текст The theory of evolution, используя в качестве речевых опор упр. 1 и 2 на стр 31 учебника 1.

2. Работа над грамматикой

Степени сравнения прилагательных

Задание 1. Прочтите информацию на стр 124-125 учебника 1

Задание 2. Выполните упр 3, 4 на стр 125-126

3. Краткое изложение содержание текста. Развитие ОК-11

Прочтите текст, изложите основное содержание каждого параграфа в 2 предложениях

Prebiotic Conditions Would Allow Organic Molecules to Accumulate

Prebiotic synthesis was not very efficient or very fast. In a few hundred million years, large quantities of or­ganic molecules could accumulate, because they didn't break down very fast. On Earth today, most organic molecules have a short life: they are either digested by living organisms or react with atmospheric oxygen. Primeval Earth lacked both life and free oxygen, so these sources of degradation were absent.

The pri­mordial atmosphere also lacked the ozone layer. It is a region high in the atmosphere that is enriched with ozone molecules, which absorbs some of the sun's high-energy ultraviolet (UV) light before it reaches Earth. During the early history of Earth, before the formation of the ozone layer, UV bombardment breaking apart organic molecules was fierce. Some places, for example, at the bottoms of shallow seas, were protected from UV radiation. In these locations, organic molecules could ac­cumulate to relatively high levels.

Even in areas protected from the sun it's unlikely that molecules dissolved in a huge ocean could reach the concentrations necessary to form spontaneously the more complex molecules. The chemical reactions in which simple molecules combined to form larger molecules such as RNA and proteins required the reacting molecules to be packed closely together. Scientists proposed several mechanisms by which the requisite high concentrations could be achieved on early Earth.

One possibility is that shallow pools at the ocean's edge were filled with water by waves crashing onto the shore. Some of the water in the pool evaporated, concentrating the dissolved substances. After many cycles of refilling and evaporation, the mol­ecules in these pools became a concentrated 'primordial soup' in which chemical reactions could generate complex organic molecules. These molecules then became the build­ing blocks of the first living organisms.