Transcription of GRADE 8 NATURAL SCIENCES MEMORANDUM
1 GRADE 8 NATURAL SCIENCESMEMORANDUMMODULE 1: LIFE AND LIVINGLIFE AND LIVING 1 1 1 1 3 4
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4 23 24 26 26 Table of contentsGraphs IntroductionAnalysing graphsLine graph Line graphBar graphs (charts) and histogramsPie graphAssignment 1: graph exercisesLine graphBar graphPie graphPhotosynthesis and respirationIntroductionPhotosynthesisThe sun is the ultimate source of energyThe process of photosynthesisPlants convert glucose into other compoundsRespirationRespiration releases energy from foodRespiration and photosynthesis cycleConducting investigationsObservation and research questionIntroductionAimHypothesisMateria lsMethodsResults DiscussionConclusionReferencesAssignment 2.
5 Conducting investigationInteraction and interdependence within the environmentIntroductionEcologyInteractio ns between living thingsEcosystemsBiotic and abiotic factors 28 28 29 29 30 31 32 32 34 36 38 39
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8 71 Table of contentsThe size of an ecosystemSurvival in an ecosystemFeeding relationshipsProducersConsumersDecompose rsFood chains, food webs and energy pyramidsFood chainsFood websEnergy pyramidsBalance in an ecosystemHuman factors that disrupt ecosystem balanceAdaptationsDefining adaptationAssignment 3: adaptationChanging environmental conditions and adaptationsLack of adaptation causes extinctionAdaptations of plants Camouflage and mimicrySymbiosisConservation of the ecosystemWhy conserve species?Sustainable use of resourcesHow environmentalists conserve ecosystemsHow can I contribute to conservation?
9 MicroorganismsIntroductionTypes of microorganismsViruses BacteriaProtistsFungiPreventing infection with microorganismsCuring diseasePasteurisation VaccinesAntibioticsMicrographs and scalesHomework 1 GRADE 8 TERM 1 NATURAL SCIENCES MODULE 1 LIFE AND LIVING e-classroom 1 What does this graph show us? You may be asked to DESCRIBE the graph or to EXPLAIN the graph. When you are asked to describe the graph, you need to clarify what is happening on the graph. So, describe the graph above:The graph shows Jill s final maths score at every GRADE . We can see a general increase in scores from GRADE 7 to 12.
10 GRAPHS Introduction We are going to learn how to analyse and draw four different types of graphs: line graphs, bar graphs, histograms and pie graphs.
