The living and non-living components of the Earth contain mixtures *
* Identify the difference between elements, compounds and mixtures in terms of particle theoryElements are substances made of one kind of atomCompounds are substances made of more than one atom chemically bonded. Mixtures are impure substances that can contain more than one kind of atom that are not chemically bonded.
| * Identify that the biosphere, lithosphere, hydrosphere and atmosphere contain examples of mixtures of elements and compoundsBiosphere: In the Biosphere some natural occurring mixtures include wood, manure, blood and sugar cane.Lithosphere: In the Lithosphere the natural occurring mixtures include metal ores, sandstone and granite.Hydrosphere: In the Hydrosphere a natural occurring mixture would be salt water.Atmosphere: In the Atmosphere a natural occurring mixture is air.
* Identify and describe procedures that can be used to separate naturally occurring mixtures of: *
Solids of different sizes: Sieving to separate larger solids from the smaller. *
Solids and liquids: filtration *
Dissolved solids in liquids: Evaporation to remove liquid from solids *
* Assess separation techniques for their suitability in separating examples of earth materials, identifying the differences in properties which enable these separationsEvaporation: This method would be used when separating water from a solution i.e. salt and water. Filtration: By passing a solution through filter paper to separate it from the other solution i.e. mud and water.Distillation: Is the process of purifying a liquid by boiling it and condensing its vapors.Sieving: Passing the solution through a sieve separates the larger particles to stay in the sieve and the smaller ones to fall through. Centrifuging: A rotating machine that separates solids from liquids. Decanting: By slowly pouring the...
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