Open Question: Help with AQA Science GCSE revision?
question three
jane used a chromatography to investigate the colours used in six different sweets, 1 ? 6.
a pencil line was drawn near the bottom of the chromatography paper.
jane placed a few drops of extract from each of the foods on this line.
the paper was then dipped into some solvent in a beaker.
the diagram below shows the chromatogram obtained at the end of the experiment.
3c which of the following would give the most accurate measure of the distance moved by a dye?
1 a metre rule
2 a micrometer
3 a pair of dividers and a millimetre rule
4 a piece of 2 mm graph paper
3d what is the best way of doing a survey to find which children?s drinks on sale in the uk
contain a particular dye?
1 ask mothers at a local toddler group
2 do an internet search
3 look on the shelves in the local supermarket
4 write to as many food manufacturers as you can find in yellow pages
i put 2 for 3c but markscheme says 3
i put 3 for 3d but markscheme says 2 (an internet search?