Now listen to the professor again and fill in the gaps with one of these words or expressions of the part of the presentation

UNIT 4

NUCLEAR ENERGY

PHYSICS OF NUCLEAR ENERGY

1. Match the words with their definitions:

1) nucleus (n)		a) (not in technical usage) another word for speed
2) fission (n.)		b) the act or process of splitting or breaking into parts
3) emission (n.)		c) a species of atom characterized by its atomic number and its mass number
4) velocity (n.)		d) a corrosion-resistant toxic silvery-white metallic element that occurs chiefly in beryl and is used mainly in X-ray windows and in the manufacture of alloys.
5) nuclide (n.)		e) to produce (a substance) by a chemical process
6) incoming (adj.)		f) reconstruct
7) beryllium (n.)		g) coming in; entering
8) restore (v.)		h) energy, in the form of heat, light, radio waves, etc., emitted from a source
9) generate (v.)		i) the positively charged dense region at the centre of an atom, composed of protons and neutrons, about which electrons orbit

You are going to watch and listen to a science lecturer giving explanation how nuclear energy is produced.

2. Before you listen, think about the process of producing nuclear energy. What substances are used in the process? What is the process called? Do you think it is a complicated process?

Now watch and listen to the part of a lecture and find answers to the questions

1. To generate nuclear energy how many substances are required? Name them

2. Is plutonium a natural substance?

3. What substance is a byproduct?

4. Which of the substances is active?

5. What is the purpose of a moderator? How important is it?

6. Is the fuel used to produce nuclear energy renewable?

7. Why are power stations recommended to be built outside cities?

Now listen to the professor again and fill in the gaps with one of these words or expressions of the part of the presentation

TRANSPORTATION SHUT IT DOWN PUSHED INTO HEAT THE SAME IN THE CORE ONCE A GENERATOR

A COAL POWER STATION DRIVE A TURBINE UNLIKE

INTO STEAM CONTROL RODS WHEREAS ON THE AMOUNT OF

... In addition we have things called 1.________which can be 2.________ the nuclear reactor when it's working, and3. _________. And they do that by controlling the reaction 4. ________. All a nuclear power station does, on a nuclear reactor does, is produce 5. ______. What we then have to do is take the heat away and 6. ________ we've taken it away we can take it away and turn it 7. _________, which can 8. ____________, which drives 9. __________. This is exactly 10. _________ as in a conventional power station. 11. ____ most means of generating heat, the reactor is very economical 12. ____________fuel needed. For example, here twenty-eight tons for a year of working, 13. ___________ a power station— 14. __________ would need two thousand tons a week, this needs only twenty-eight tons a year. So we don't have large 15. ___________ large amounts of fuel…

1. You are going to read an article about nuclear energy. Discuss with your partner the following questions.

· What is nuclear energy?

· How does nuclear energy work?

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