(Form 5) 1.9.1b Factors that Affect the Growth of Microorganisms (Structured Questions)

Question 3:
Diagram 3 shows an experiment to study the effect of light on the growth of microorganisms.

Diagram 3

(a) State one observation for the bread which has been kept in the dark for two days. [1 mark]

(b) Based on Diagram 3, what is microorganism W? [1 mark]
Mark ( √ ) for your answer.

(c) State one hypothesis for this experiment. [1 mark]

(d) State the variables in this experiment.
(i) Manipulated variable [1 mark]
(ii) Responding variable [1 mark]

(a) Yellow spots are formed on the bread.


(c) Microorganisms grow well in darkness.

(d)(i) Light intensity (bright or dark)

(d)(ii) The growth of microorganisms

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