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...carbonate (CaCO3). Whereas most minerals are identified on the basis of physical characteristics (density, hardness, colour, etc.) calcite can also be readily identified with a chemical test. Calcite reacts with dilute hydrochloric acid, liberating bubbles of carbon dioxide (CO2) gas in a vigorous fizzing froth. The chemical reaction is written as In words, this equation...

...carbon), and sulphur found in volcanoes. Most minerals though, are compounds, i.e. different combinations of different elements, just like words are various combinations of different letters. The mineral quartz (SiO2) is quite a simple word, just made up of the elements silicon (Si) and oxygen (O). Transcript The mineral garnet is much more complicated and can have...

...Carbon-fibre composite 500 200 60 1100 454 181 54 Magnesium-based alloy 300 300 45 1780 176 176 25 You can see the great potential for carbon-fibre composites and the strong competition between the other frame materials, particularly for the deflection-based index E/ρ. However, there are three major limitations that need consideration before we all go out and start...

...carbonate. Boiling the cellulose in the potassium hydroxide broke down the fibres allowing them to interweave to make paper. Once the fibres had been washed they were then sized (coated) with sticky cherry liquid. This would prevent the ink soaking in like blotting paper. Our scientists made a paper press to squeeze out excess moisture before leaving the sheet to dry in...