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Revision Tutorial

Integrated Science 2B: Water

Report Writing Task

Exam Hints

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Report writingReport Essay

Presents information Presents an argument

Table of contents and numbered

pages

No contents page

Uses numbered headings andsubheadings

Minimal subheadings if any

Uses short concise paragraphs and

dot points where applicable

Links ideas into cohesive

paragraphs, rather than breaking

down into dot points

Graphics used (illustrations, tables,

graphs)

No illustrations

References required References required

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Report Format

Title Page

Contents

Report information Headings and subheadings

Graphics titled

Dot points where relevant

Bibliography

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Marks

Use note taking sheets with headings drawnfrom the task sheet

Check the marking guide Complete all aspects

Use the report format described

Add titles to graphics

Reference correctlyat least 2 more sources; 1online and 1 using text/book

Hand in notes, report, bibliography

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Exam hints

Semester 2 only - Water topic

water importance & properties

aquatic ecosystems

water resources & sustainability

experimental design

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Exam format

2 Hour paper

Multiple choice

Short Answer (6 questions)

Extended Answer (2 parts with anenvironmental problem andexperimental design component)

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properties

Covalent bonding

Hydrogen bonding

Polarity Soluble, insoluble,

immiscible

CohesiveAdhesive

Capillary action

Surface tension

Density

Salinity

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ecosystems

Osmosis

Hypertonic,

hypotonic, isotonic Osmoconformer and

osmoregulator

Eutrophication

Bioaccumulation Non biodegradable

Biomass

Food pyramids andwebs

Turbidity Photosynthesis

Respiration

Plankton Trophic

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water resources & treatment

Sedimentation

Aeration

Coagulation Flocculation alum

Disinfection

B.O.D Reverse osmosis

Distillation

Deionisation

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Skills

Graphing (LUST)

Calculations solution concentrations

Explaining scientific concepts

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Experimental design

Independent Variable : manipulated variablebeing investigated. It is changed in theexperimental setup

Dependent Variable : responds to thechanges made to the independent variable

Controlled Variables : specify (quantitate) all

variables being controlled to prevent an effect

Hypothesis : states how the dependentvariable will change in response to the

independent variable

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EXAMPLE

Design an experiment to investigate ifdiameter affects capillary action

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diagram

Petri dish 1cm

coloured water

Glass tubing

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expected results

Height of the water inside the tubedecreases as the tube gets larger

Tube diameter Maximum height of water (mm)

Trial 1 Trial 2 Trial 3 Average

1mm

2mm

5mm

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Eutrophication

Excess nutrients (phosphates and nitrates)

Sources

Fertilisers in runoff Detergents

Sewage

Organic matter

Promote plant growth, especially algae

Increased population of algae

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Large numbers of dead algae

Dead organisms are broken down by

bacteria

Increase in bacterial population - excessfood source

Bacteria need to respire, thereforerequire oxygen

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Lots of bacteria, lots of respiration, lotsof oxygen used, oxygen obtained from

the water Decrease in dissolved oxygen content of

water

Fish kills due to chocking of waterway(chocking = removal of oxygen)

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What causes the reduction in dissolvedoxygen in eutrophication?

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Bioaccumulation

Higher trophic levels can accumulateheavy metals, insecticides and

pesticides why does this occur?

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Compounds are not biodegradable

They do not breakdown but are

retained in the organisms body Higher trophic level organisms consume

many of the organisms below them

In doing so they retain all of the non-biodegradable material within thatorganism and it builds up

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Exam Preparation

Review syllabus (unit handout)

Review classwork and seek additional

information (internet)

Write study notes, prepare summaries,concept maps, flash cards

Memorize relevant material

Practice questions