B Unscramble the words that denote the chemical elements. The Latin letters standing for the chemical elements will help you

A Match the word in column A with an appropriate word in column B

Make a chart like this.

III. A lot of information is given in the texts. Some of it is in favour of the nuclear power, some is against, some is neutral.

II. Match the beginnings of the numbered sentences below with the endings on the right to restore the sentences from the texts.

I. Answer these questions.

1. What happened on April 26,1986, in Chernobyl?

2. What measures were taken to control the radioactive release?

3. What were the effects of the accident?

4. Why was Chernobyl a very major accident?

5. Chernobyl resulted from violations of safety regulations and design flaws in the reactor, didn’t it?

6. What is the future of nuclear power?

7. Who discovered radioactivity and when?

8. What are the principal types of radiation?

9. What are the most worrisome radionuclides from the standpoint of human health? Why?

1. Some of the first casualties were firemen	a externally (through the skin) or internally (by consuming the food).
2. Enormous sums of money have been spent since	b that safety and radiation protection standards are very high and that nuclear power offers a real benefit.
3. Areas where heavy rainfalls caused concentrated patches of ground contamination	c does not have the side effects of acid rain and possible changes in the climate.
4. Unlike the burning of coal, nuclear energy	d many of whom suffered severe radiation burns fighting secondary fires caused by hot fuel fragments falling on flammable roof materials on other reactor buildings.
5. The future success of nuclear power depends on the public being convinced	e were particularly badly affected.
6. In the immediate future, radioactivity will undoubtedly continue to be an emotive subject	f the spontaneous disintegration of the nucleus of a radioactive element such as uranium-238.
7. Radioactivity arises from	g in terms of sieverts (Sv), or the number of grays times an appropriate quality factor.
8. Humans can absorb radiation either	h as will nuclear safety and waste disposal.
9. For this reason, radiation doses are usually measured	i on decontamination and protection of water supplies.

FOR	AGAINST	NEUTRAL

Complete your chart. Can you add any more information to your chart?

IV. Do a quiz “Are You a Good Scientist?”

a What is measured in

1. curies (Ci) a irradiation

2. grays (Gy) b radioactivity

3. joule c absorption

4. sieverts (Sv) d energy

b Give a definition to

1. dolomite a a building material

2. sand b a mineral

3. concrete c very small fine grains of rock

Pb U Sr B H O Cs Ra

robon

deal

unamiru

dogyhern

xegony

duriam

rituntosm

sumeci

Results:

15 correct answers – excellent

14- 12 – very good

11-9 – satisfactory

8 –7 – passing grade

6 and less – fail

Дата добавления: 2014-11-16