Enjoy your holidays!Teacher
Monday, 25 June 2007
Wednesday, 13 June 2007
TASK 22: Metals
Metals are very useful and are often used, because they have special properties. Some of them are even called noble metals. But in some cases they can be unpleasant, for instance, there is no warmth in them. Wood, on the other hand, is much more pleasant to touch or to sit upon. Can you find some more advantages or disadvantages of metals?Teacher
Monday, 4 June 2007
TASK 21: Atoms
"The smallest type of atom, hydrogen, has a diameter of 10-8 cm." Can there be anything smaller than protons, neutrons, electrons?Teacher
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