1)appreciate the role of metals and nonmetals in the maintenance of body pH (acidity, basidity)
2)write the uses of metals and nonmetals in daily life and how their utility will conserve the biodiversity
3)what are bad effects on environment
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2. Uses of metals
A. Copper and aluminium is used for making electric wire
B.gold and silver is used for making Jewellery
C. Mercury is used in thermometer
Uses of non metals
A. Graphite is used in making electric wires and for pencil nib
B. Chlorine is used in making bleaching agent
C. Nitrogen is used in making nitric acid
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