5. Personal response :
Are the rumours harmful? Why/Why not?
(B) Read the passage and do the activities :
31. Name the following:
(1) Scientist who discovered the properties of Uranium-
(ii) Two radioactive elements discovered by Curies --
(iii) An admirer of the Curies -
(iv) A black very hard and expensive substance -
rie was specially interested in a substance called uranium which wa
nde, a black, very hard and very expensive substance. Uranium wa
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