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Week 3: Preservation, Fermentation & Shelf Life

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About this activity

Essentials of food preservation.

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Australia

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Week 3: Preservation, Fermentation & Shelf Life
 

Week 3: Preservation, Fermentation & Shelf LifeOnline version

Essentials of food preservation.

by clare.fitzpatrick@education.vic.gov.au
1

What is the main purpose of food preservation methods?

2

Fermentation primarily preserves food by producing which type of compounds?

3

Which method is a form of active fermentation?

4

Which factor most directly affects shelf life besides preservation method?

5

What spoilage indicator often signals food is unsafe?

6

Which practice helps maximize shelf life of perishable items?

7

Which term describes reducing water activity to preserve food?

8

Which preservation method uses salt to draw out moisture?

9

What is a common shelf-life extension in canned foods?

10

Which storage condition most impacts mold growth on bread?

Feedback

Preservation slows spoilage, extending how long food remains safe and edible.

Lactic acid lowers pH and inhibits spoilage microbes in many ferments.

Lacto-fermentation uses lactic acid bacteria to preserve foods.

Lower temperatures usually slow microbial growth and extend shelf life.

Unpleasant smells often indicate microbial activity and spoilage.

Cold storage slows microbial growth and enzymatic reactions.

Removing water makes microbial growth harder.

Salt creates osmotic pressure, inhibiting microbes.

Proper sealing and heat kill microbes and prevent contamination.

Moisture plus warmth promotes mold; dry, cool storage helps prevent it.

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