Use these to refresh your memory

Science at St Johns

Controlled Assessment

PRIMARY EVIDENCE AND RECORDING

/4

Results recorded in a table

Clear headings in table

Headings include units

Repeat readings recorded

Average (mean) calculated

Make sure all your results are recorded to the same number of decimal points

Science at HFS

Controlled AssessmentSECONDARY EVIDENCE

/2 Secondary data must be collected from the internet or text books. This can include data relating directly to this investigation or relevant information about how the position of the leaves affects their length ans width

It needs to relate directly to the hypothesis

Record in your exercise book where you found your secondary evidence and print off the relevant pages.

Explain why you have chosen this secondary evidence. How does it help to prove your hypothesis? Is it a similar task to the one you carried out?

Explain if you can trust your secondary evidence. Is the evidence credible? e.g. is there any bias in it, can you trust the website? Are there repeats? Has it been peer reviewed?

Task: Test the hypothesis that the position of the leaves on a plant affects the length and width of the leaves

Science at St Johns

Controlled AssessmentPR0CESSING EVIDENCE /4

Draw a graph of your results (you should now know if it is a line graph or a bar chart you should use)

The independent variable always goes on the X axis

The dependent variable on the Y axis

Have you used a suitable scale?

Does your scale go up in regular amounts on the X and Y axis?

Have you labelled your axes?

Have you included units on your axes?

Have you drawn a line/curve of best fit for a line graph

Have you written a title for your graph?

Controlled AssessmentQUALITY OF EVIDENCE /4

Did you have any anomalous results in your primary evidence? What did you do about the anomalous results? Indicate any anomalous results on your table or graph Explain why you have excluded these results (do not follow the pattern) Were your repeat readings similar (concordant)? What does this tell you about the quality of your primary evidence?

If you didn’t have any anomalous results, you need to state this.

Were there any anomalous results in your secondary evidence?If you did not find any, you need to state this.

State how you identified and dealt with anomalies from your primary and secondary evidence

EVALUATION OF METHOD /6

what were the strengths in your method Why are these strengths? How did they help you test the hypothesis?

what were the weaknesses in your method? How have these these have led any anomalous results?How improve the method How have the weaknesses affected your ability to test the hypothesis

Describe the strengths and weaknesses in your method