AQA GCSE ISA SECTION 1 GUIDE

AQA GCSE ISA SECTION 1 GUIDE

1. 1. HYPOTHESIS

   • Clear and mentioning independent and dependent variables
   • Clear explanation with scientific language

2. 2. SOURCES

   • Two with title/author/webpage mentioned

3. 3. NINE MARK QUESTION

   • Most equipment
   • Valid method
   • Control variables and how they are controlled
   • Hazards, why they are hazard and control measures
   • SPaG

4. 4. SHARING RESULTS

   • Enables you to compare your results with those of others to see if there are any similarities or differences
   • With more results it is possible to calculate a more accurate mean an minimize the effect of random errors
   • Allows reproducibility to be confirmed

5. 4. COMPARING RESULTS

   • Allows you to check your results
   • Enables reproducibility to be confirmed
   • See whether there is a similar pattern in the results

6. 4. ERROR

   • The __ should be checked to see if it reads zero before being connected
   • Record the reading on the meter when it is connected and add or subtract this value from all readings OR try and reset the meter when it is not connected

7. 4. DIFFICULTY IN COLLECTING DATA

   • Identify a difficulty in collecting data
   • Suggest a solution as to how the difficulty might be overcome
   • Explain how the solution will overcome the difficulty

8. 5. TABLE

   • Correct headings and units present for all measured variables

9. 4. SUITABLE RESOLUTION

   • Mention a suitable resolution
   • Statement as to why this value is appropriate and a clear explanation as to the reason

10. 4. REPEAT - ACCURATE

    • Enables a check for consistency to be made or anomolous results to be detected
    • Enables a mean to calculate which minimises the effect of random errors

11. 4. CONTROL VARIABLE

    • Identify an appropriate control variable
    • Explain that controlling variables ensures results are valid
    • Describe how variable should be controlled

12. 4. SECOND METHOD

    • Outline an alternative method in sufficient detail so that necessary steps are clear
    • Suggest a sensible explanation as to why this alternative method would not be as good as the chosen one