3. Напишите все типы вопросов к следующим предложениям:

1. They are in a state of continuous motion.

2. Atoms consist of three kinds of particles.

3. Atom is electrically balanced.

4. Ответьте на следующие вопросы:

1. What is any matter composed of?

2. When do the molecules move more extensely?

3. What is an atom?

4. What do atoms consist of?

5. What does have a negative electric charge?

6. What is a chargeless mass?

5. Кратко перескажите текст урока.

EXERCISES:

1. Напишите следующие предложения в вопросительной и отрицательной форме. Переведите предложения на русский язык.

1. A molecule moves about within the body of the liquid from point to point.

2. We can see large molecules in an electron microscope.

3. Every substance consists of particles so small that we cannot see them even under a good microscope.

4. The oxygen component of the air is what supports our life.

5. The molecules of gas move rapidly and continually.

6. We name the smallest physically indivisible particles of matter atoms.

2.Поставьте данные предложения в вопросительную и отрицательную форму (Passive Voice of Simple Tenses):

1. Proton is positively charged.

2. This device is demonstrated in a technical laboratory.

3. The plant was reconstructed three years ago.

4. The new equipment will be tested next month.

3.Переведите следующие предложения на русский язык, обращая внимание на страдательный залог.

1.Many scientists from various institutes were invited to work at the design of the complex.

2. The young specialists were offered to concentrate their efforts on the construction of devices.

3.The designers were given the necessary information about the equipment.

4. Переведите предложения на русский язык:

1. There are more than a hundred different atoms.

2. There are hundreds of thousands of substances – combinations of elementary forms of matter. We call them compounds.

3. There is a connection between atmospheric pressure and the weather.

4.There are molecules of different size and weight.

5. At the present time there are some sputniks which travel round the sun.

5. Переведите следующие предложения на русский язык; обратите внимание на значение слова “that”.

1. Now we know that all substances consist of very small invisible particles – atoms.

2. Atoms make up the air that man breathes, the food that he eats, the ground on which he walks, and their interactions provide the energy that he uses.

3. It was at the beginning of the 19-th century that the scientists first established experimentally the atomic theory of the structure of matter.

4. A further discovery was that the atoms combined in small numbers and form molecules and that in all substances the atoms were in a state of rapid motion.