Biology 9700/33 March 2021 | Cambridge AS Level Past Papers With Mark Scheme

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- Investigation of diffusion using agar cubes stained with universal indicator and hydrochloric acid.
- Preparation of varying concentrations of hydrochloric acid through proportional dilution.
- Measurement of time taken for agar cubes to change color as a function of acid concentration.
- Identification of dependent variables and sources of error in experimental procedures.
- Modification of procedures to assess the impact of temperature on diffusion rates.
- Analysis of diffusion rates of salt in cheese over time, including graphical representation and calculations.

CIE AS & A Level Biology (9700) Mar 2021

Laura Bellini

Classification: Paper 3

Page count: 16

Viewed: 168

Last update: 2 months ago

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