Presentation on theme: "Higher Biology Unit 1: Cell biology Unit 2: Genetics & Adaptations"— Presentation transcript:
1 Higher Biology Unit 1: Cell biology Unit 2: Genetics & Adaptations Unit 3: Control & Regulation
2 Higher Biology Exam Paper Format Marks Section A 30 Multiple Choice 30 Section B Short answerSection C Extended Answers 20___TotalProblem solving and Practical Abilities make up 33% of Section A & B = 40 Marks.Bring the basics : Pen, pencils, rubber, ruler and calculator.
3 Higher Biology Exam Tips Look at the essay questions but don’t do the essay.Start the paper but takes notes on the essays as you go through it.Time your paper.Check the number of marks for each question and answer appropriately.Sweep through the paper.DO NOT get STUCK on any question.Go back to hard questions and work on them at end.Leave time to do the essays.At least 10 minutes for each one.Make sure you do TWO7. Multiple choice questionsRemember there is only 1 correct answer and 3 distractors.Cover up the answer and work out the correct one.Make sure you answer all questions.
4 8. Be accurate in your answers, to two decimal places. Include units in measurements.Make sure graphs have labelled axes and units.Take up at least 50 % of graph paper.Scale is regular.DO NOT GO through ZERO unless there is a cross thereUse pencilMake sure you can dopercentagesaveragesratios10. If asked to - explain – account for - describe - use more than a few words.11. Do NOT use etc.12. If you finish before the time , spend it going over the paper and try to improve your answers.
5 … problem solving is no problem! You will practice the following areas:Selecting informationPresenting informationProcessing informationExperimental procedures
6 Selecting information Questions usually start with:From the graph, calculate the difference between..Use values from the graph to describe the effect of…Always read the questions carefully – ALL of it!The variable being changed is always on the X axisWhat is being measured in on the Y…ALWAYS use the units in your answerWatch out for double Y axis with different scales... Use the keyUse a ruler to measure off pointsCalculate the scale by seeing how much 1 small scale is worthWhen asked to DESCRIBE a trend always use VALUES from the GRAPH
7 Presenting information Questions usually ask you to present information that has been provided in a table in the form of a graph – usually a line graph.Continuous variable = line graph Discontinuous variable = bar chartTop Tips…Check the question for details to draw a line or bar graphMarks are awarded for correctly labelling the axis with units, plotting the points and joining the points with a straight line using a rulerAppropriate scale uses 50% or more of the available graph paperLabel each axis with same wording as in the results table headingsDouble check your plotting points as one wrong point can throw the rest outBe careful to check if there is a ‘0’ value to plot
8 Processing Information The most common questions ask you to calculate percentages, ratios and averagesExpress a number as a %:Number needed as a % X 100Totalb) Percentage change – increase or decrease: Allows a fair comparisonStep 1: calculate the change – increase or decreaseStep 2: express this value as a %Change (increase or decrease) X 100Original starting value
9 Processing Information RatiosUsed as a comparison of values. As a simple (smallest) whole number ratio.Obtain the numbers from the questionMake sure you write them in the same order as the questionSimply them by dividing the larger number by the smaller oneIf this fails to give a whole number you need to find an number that will divide into both numbers
10 Experimental Procedure You will be tested on your ability to answer the following:Give a reason why the experiment was repeatedGive one precaution taken to ensure that the results would be validDescribe a suitable controlExplain why a control experiment was necessaryWhy is it a good experimental procedure to do …?What precautions should be taken to minimise errors?Why would an experiment be left for ‘X’ length of time?Reliability, variables, fairness, validity, controls, measurements required, sources of error, suggested improvements, draw conclusion, make predictions…
11 Repeat to Obtain an Average to increase Reliability Top Tips…Reliability = Repeated/many samples/readingsR.O.A.R Repeat to Obtain an Average to increase ReliabilityValidity = only one variable is alteredControl experiment = allows comparisonLeft for ‘X’ length of time = To allow ‘Y’ to take placeNever, never, never, never NEVER use the word… AMOUNT!!!!
12 Extended Response Questions UnstructuredDivide into parts and answer each part in a paragraph or use subheadings.Keep to the question asked – keep re reading the questionThe answer must be relevant and the facts accurateLook at the marks allocated to the question. If it is worth 5 marks then at least 6 points.Sometimes two points are needed for 1 markIf no marks are given for each part of a question then try to work out how they are being allocated.