Page 52 - SCIENCE DLP T6 SK (SEMAKAN 2017)

Suitable Acidity

How do preserved mangoes remain
fresh for a longer time?

I think that the acidity of the preserved liquid is
unsuitable for the growth of microorganisms.

Let’s conduct an experiment using apple
slices to investigate whether acidity affects
the growth of microorganisms. One apple
slice is soaked in vinegar while the other
slice is soaked in tap water.

Based on all the conducted experiments, what conclusions
can you make regarding the factors that affect the growth
of microorganisms?

Uses of Microorganisms

Did you know that bread is soft and fluffy because of the actions
of microorganisms? Some actions of microorganisms by fungi,
bacteria, algae, and protozoa are useful to us.

Wow, this bread is How do the actions of
so soft and fluffy!
microorganisms benefit us?

Manufacture of food products

Bacteria are used in
Bacteria and fungi are used
to make cheese. manufacturing yogurt.

Fungi are used Yeast is used to make bread
to make tempeh. and fermented rice.

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