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6 Cards in this Set
- Front
- Back
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What gases make up the earths atmosphere? (%) |
78% nitrogen 21% oxygen 1% Other (mainly argon) 0.04% carbon dioxide |
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Describe the formation of sedimentary rocks... |
Layers of sediment are laid down in lakes or seas. Layers get buried. Over millions of years, pressure pushes out water. Minerals act as cement |
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What are some uses of limestone? |
Building materials Cement Chippings in road surfacing Glass Concrete |
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What is the equation for the thermal decomposition of limestone? Calcium carbonate➡calcium oxide and carbon dioxide |
CaCO3➡thermal decomposition➡CaO + CO2 |
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Thermal decomposition of carbonates gives off what gas? |
Carbon dioxide |
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Calcium oxide reacts with water to produce... |
Calcium hydroxide E.g- calcium oxide + water➡calcium hydroxide (CaO+H2O➡Ca(OH)2 |
