Module 1 | The chemical Earth
Focus 1: The living and non-living components of the Earth contain mixtures
Lesson 1 | Matter on Earth
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Identify the difference between elements, compounds and mixtures in terms of particle theory.
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Identify that the biosphere, lithosphere, hydrosphere and atmosphere contain examples of mixtures of elements and compounds.
Lesson 2 | Separation & analysis of mixtures
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Identify and describe procedures that can be used to separate naturally occurring mixtures of:
– solids of different sizes
– solids and liquids
– dissolved solids in liquids
– liquids
– gases -
Assess separation techniques for their suitability in separating examples of earth materials, identifying the differences in properties which enable these separations.
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Identify data sources, gather, process and analyse information from secondary sources to identify the industrial separation processes used on a mixture obtained from the biosphere, lithosphere, hydrosphere or atmosphere and use the evidence available to:
– identify the properties of the mixture used in its separation
– identify the products of separation and their uses
– discuss issues associated with wastes from the processes used -
Describe situations in which gravimetric analysis supplies useful data for chemists and other scientists.
Lesson 3 | Separation of a simple mixture
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Identify data sources, plan, choose equipment and perform a first-hand investigation to separate the components of a naturally occurring or appropriate mixture such as sand, salt and water.
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Gather first-hand information by carrying out a gravimetric analysis of a mixture to estimate its percentage composition.
Lesson 4 | Writing and balancing chemical equations
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Construct word and balanced formulae equations of chemical reactions as they are encountered.
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Gather and present information from first-hand or secondary sources to write equations to represent all chemical reactions encountered in the Preliminary course.
