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]
Answer:
(a) Yellow spots are formed on the bread.
(b)
(c) Microorganisms grow well in darkness.
(d)(i) Light intensity (bright or dark)
(d)(ii) The growth of microorganisms
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]
Answer:
(a) Yellow spots are formed on the bread.
(b)
(c) Microorganisms grow well in darkness.
(d)(i) Light intensity (bright or dark)
(d)(ii) The growth of microorganisms