Question 1:
Figure 1 shows the results of an experiment to study the effect of different antibiotic concentrations on the growth of bacteria.
Answer:
(a) The higher the concentration of the antibiotic, the larger the area of the clear region.
Figure 1 shows the results of an experiment to study the effect of different antibiotic concentrations on the growth of bacteria.
(a) State one hypothesis for this experiment.
(b) State the variables in this experiment.
(i) Constant variable
(ii) Manipulated variable
(c) What is the effect of antibiotics based on this experiment?
Answer:
(a) The higher the concentration of the antibiotic, the larger the area of the clear region.
(b)(i) Type of bacteria, surrounding temperature
(b)(ii) Concentration of antibiotic
(c) Antibiotics can kill bacteria.