М. М. Кутепова The World of Chemistry Мир

b) Give your answer to the following quiz; add other characteristics of the element.
Which metal is the best conductor of heat and electricity? Its conductivity is a standard, which means that all other metals are compared to it when it comes to measuring their conductivity of heat and electricity. Another thing about it is that it reflects 95% of all the light reaching it, which makes it the whitest and brightest of all metals. It was the rarest and most precious metal for ancient Egyptians. It is five hundred times more expensive than iron, fifty times more expensive than copper, but is only worth one-fiftieth as much as platinum and one-twentieth as much as gold.

11. 
    The two friends (Ann and Mike) spoke with their fellow student (Leo Matveyev) and advised him to take part in the Conference on New Discoveries in Chemistry to be held in the nearest future, and Leo got the invitation. He was happy but he didn’t know how to write a letter to inform the
    

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Organizing Committee that he would be a participant. Will you help Leo to write the letter? The Conference will take place in January, from 25 to 31,

200. 
     . , in New York University, USA. The Chairman of the Conference is Dr. Philip Corn.
     

12. 
    Speak on the following topics:
    

1. 
   The Periodic Table and Periodic Law.
   
2. 
   The Matter of State or the States of Matter.
   

UNIT 5

WHY IS WATER SO IMPORTANT?


Grammar: Direct and Indirect Speech.
Speech Strategy: RE-ASKING. ORAL AND WRITTEN SPEECH.

1.