Edexcel Unit C1 Topic 2 - Useful Products from Earth

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Topic 2 Materials from the Earth
2.1 Describe that igneous rocks, such as granite, are:
a formed by the solidification of magma or lava
b made of crystals whose size depends on the rate of cooling
2.2 Describe chalk and limestone as examples of sedimentary rocks
2.3 Describe how sedimentary rocks are formed by the compaction of layers of
sediment over a very long time period
2.4 Recall that sedimentary rocks:
a may contain fossils
b are susceptible to erosion
2.5 Describe marble as an example of a metamorphic rock
2.6 Describe the formation of metamorphic rocks by the action of heat and/or
pressure, including the formation of marble from chalk or limestone
2.7 Recall that limestone, chalk and marble exist in the Earth's crust and that they are
all natural forms of calcium carbonate
2.8 Demonstrate an understanding of the balance between the demand for limestone
and the economic, environmental and social effects of quarrying it
2.9 Demonstrate an understanding of the commercial need for quarrying calcium
carbonate on a large scale, as a raw material, for the formation of glass, cement and
2.10 Describe the thermal decomposition of calcium carbonate into calcium oxide and
carbon dioxide
2.11 Investigate the ease of thermal decomposition of carbonates, including calcium carbonate,
zinc carbonate and copper carbonate
2.12 Describe the ease of thermal decomposition of different metal carbonates
2.13 Demonstrate an understanding that:
a atoms are the smallest particles of an element that can take part in chemical
b during chemical reactions, atoms are neither created nor destroyed
c during chemical reactions, atoms are rearranged to make new products with
different properties from the reactants
2.14 Describe the effect of water on calcium oxide
2.15 Describe how calcium hydroxide dissolves in water to form a solution, known as

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Demonstrate an understanding that the total mass before and after a reaction in
a sealed container is unchanged, as shown practically by a precipitation reaction
2.17 Explain how calcium oxide, calcium hydroxide and calcium carbonate can be used
to neutralise soil acidity
2.…read more


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