Year 8 Revision Summer 2015
Be Scientific
You should know:
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Science safety rules.
Meaning of hazard warning symbols.
Name and use of simple scientific apparatus.
How to light a Bunsen burner and adjust flames.
How to use basic measuring equipment.
Units of measurement.
To recognise a fair test.
How to draw and label scientific diagrams.
Dissolving
You should know:
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Some solids are soluble, others are insoluble.
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The meaning of the terms – solute, solvent, solution, saturated solution.
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Three ways to speed up dissolving.
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Solubility of solid solutes increases as the temperature of the solvent
increases.
Separating techniques
You should know:
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How to separate an insoluble solid from a liquid by
decanting and filtering.
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How to separate a soluble solid (solute) from a solvent by evaporation.
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How to separate a solvent from a solution by distillation.
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How to separate two immiscible liquids.
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How to draw and label diagrams of the apparatus used in separating
techniques.
Acids & Alkalis
You should know:
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Acids are sour, soluble substances.
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Alkalis are soluble and the chemical opposite of acids.
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Strong acids and alkalis are corrosive.
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Neutral substances are neither acidic nor alkaline.
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Indicators change colour in acids and alkalis,
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Colours of Litmus, Universal Indicator and Red Cabbage solutions.
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The pH scale.
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Every day uses of neutralisation.
Water
You should know:
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The stages in the water cycle.
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Tests for water - cobalt chloride paper, anhydrous copper sulphate.
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Three ways to speed up evaporation.
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Evaporation causes cooling of the surroundings.
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Water travels up narrow tubes – capillarity.
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How to detect microbes using petri dishes filled with agar jelly.
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Causes of water pollution.
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Stages in water treatment.
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How to make a model filter.
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Water finds its own level.
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Water pressure increases with depth.
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Streamlined shapes move through water fastest.
Living Things
You should know:
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The seven characteristics of living things.
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How to classify living organisms – vertebrates/invertebrates.
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Names and features of (a) the five vertebrate groups (b) arthropods.
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The stages in insect life cycles. . How to use a key.