Page 39 - SK Year 6 Science DLP

MICROORGANISMS
MIKROORGANISMA

Let us plan an experiment
to test the hypothesis. We can
determine the factors by using
different situations as shown in We set the size of the pieces of
this table. guava as the constant variable.

Plastic
Factors Situation of plastic bags containing guava pieces
Bag
A Left open. Cut 10 thin pieces of
Air The plastic bag is tied after the air is drawn out using
A1
a vacuum pump. guava so that they
The plastic bag is tied after a guava piece is dried
B
Water using a hair dryer. are easily dried.
B1 The plastic bag is tied.
C The plastic bag is tied after 50 ml sugar is added.
Nutrient The plastic bag is tied after 50 ml solution without
C1
sugar is added.
D The plastic bag is tied after 50 ml vinegar is added.
Acidity
D1 The plastic bag is tied.
E The plastic bag is tied and placed in a refrigerator.
Temperature The plastic bag is tied and placed outside a
E1
refrigerator.

Let us conduct the experiment. Make observations after a week to test the
hypothesis and record them.
Record your observations in a table as shown below.

Plastic bag Observations on the piece of guava after one week
A
A1
B
Write a report on your experiment.
The following questions can help you make a conclusion.

Questions
1. State the factors that cause fungi to grow on guavas.
2. What are the methods that can be used to prevent guavas from getting
rotten?

Conclusion
What is the conclusion?

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