"Slow down the speed of food spoilage" Food PPT

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"Slow down the speed of food spoilage" Food PPT

Part One: Observing Spoiled Food

Observe a fresh small dried fish and fresh dried noodles.

What are the characteristics of fresh food?

Observe a small fish that has begun to rot and noodles that have gone sour.

What are the characteristics of spoiled food?

Things to note when observing spoiled food:

1. Do not touch food directly with your hands.

2. Wash hands with soap after observation.

3. Use a fan to smell and smell as little as possible.

What are the similarities between rotten fish, sour noodles and moldy bread?

Change in taste (sour, smelly)

Color changes

Hairy, moldy

The deterioration process is similar and requires conditions such as temperature, moisture, and nutrients.

Slow down the speed of food spoilage PPT, Part 2: Various methods of storing food

How to slow down food spoilage?

Destroy the growth environment of microorganisms

What are some ways to store a fish?

Summarize the methods and principles of slowing down food spoilage.

Destroy the living environment of microorganisms

Air - sealed packaging method, vacuum packaging method...

Moisture - exposure method, pickling method...

Temperature - Freezing, high or low temperature sterilization...

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For more information about the PPT courseware "Food Slows Down the Speed ​​of Food Spoiling", please click on the "Food ppt Slows Down the Speed ​​of Food Spoiling" ppt tag.

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Update Time: 2024-11-22

This template belongs to science courseware Fourth Grade Science Volume 2, Textbook Edition industry PPT template

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