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11
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Aylisha Woodall
31/08/2025
Food & Nutrition
food tech revision
999
•
31 Aug 2025
•
Why Does Food Spoil and How Can You Stop It?
Aylisha Woodall
@awoodall302
1 / 6
Food Storage Guidelines
Proper food storage is crucial for maintaining food safety and preventing spoilage. This section details specific storage requirements for different food types.
Highlight: Refrigerator temperature should be maintained between 0-6 degrees Celsius.
Definition: Ambient foods are those stored at room temperature in a cool, dry place.
Storage methods for preventing microorganism growth include:
- Freezing at -18 degrees Celsius for long-term storage
- Drying to remove moisture
- Sugar preservation
- Vacuum packing
- Pickling in brine or vinegar
Example: Meat and poultry must be stored on the bottom shelf of the refrigerator and defrosted fully to ensure proper food safety.
Local Produce and Farming Methods
This section examines the advantages of local produce consumption and different farming approaches.
Highlight: Local produce offers multiple benefits including reduced CO2 emissions and support for local economies.
Definition: Sustainable fishing involves maintaining adequate fish populations while protecting marine habitats.
Example: Local caught ingredients include:
- Mackerel
- Haddock
- Mussels
- Scallops
Comparison of farming methods:
- Organic farming: Uses fewer chemicals but yields lower production
- Conventional farming: Higher yields but more intensive use of pesticides
Cooking Methods and Nutrient Preservation
This section details various cooking methods and their effects on nutrient retention.
Highlight: Different cooking methods have varying impacts on nutrient preservation and sensory qualities.
Example: Water-based cooking methods:
- Boiling: Greatest nutrient loss
- Steaming: Better vitamin retention
- Blanching: Helps preserve color and nutrients
- Poaching: Can lose up to 50% of vitamin C
Definition: Dry cooking methods like stir-frying can preserve nutrients while improving flavor and color.
Food Safety Principles
This comprehensive section covers essential food safety guidelines and high-risk food management.
Definition: High-risk foods are those prone to bacterial growth if not properly stored, prepared, or cooked.
Vocabulary: Key food safety terms:
- Use-by date: Strict consumption deadline
- Best-before date: Quality indicator
- Enzymic browning: Natural food deterioration process
Example: High-risk foods include:
- Cooked meat and fish
- Dairy products
- Shellfish
- Gravies and sauces
Kitchen Safety and Hygiene
This section outlines essential kitchen safety practices and proper food handling procedures.
Highlight: Proper use of color-coded chopping boards:
- Green: Salads and fruits
- Blue: Raw fish
- Red: Raw meat
- Brown: Vegetables
- Yellow: Cooked meats
- White: Dairy and bakery
Definition: Raising agents include:
- Baking powder
- Eggs
- Yeast
- Steam
Example: Essential kitchen hygiene practices:
- Hair restraint
- Proper apron use
- Regular surface sanitization
- Proper hand washing
Food Spoilage and Microorganisms
This section explores the fundamental causes of food spoilage and the role of various microorganisms. Food deterioration occurs through multiple factors including environmental conditions and microbial activity.
Definition: Pathogens are organisms that cause disease to their host, playing a significant role in food spoilage.
Highlight: Key factors contributing to food spoilage include oxygen, heat, light, humidity, temperature, and improper ventilation.
Example: Common signs of food spoilage include changes in color, texture, unpleasant odor, and undesirable taste.
Vocabulary: Microorganisms in food spoilage include:
- Bacteria: Single-cell organisms causing decomposition
- Yeast: Responsible for spoiling items like bread
- Molds: Affect various food products including dairy and fruits
According to the text, what factors contribute to food spoilage?
Pressure, vacuum, carbon dioxide, and heat
Darkness, dryness, nitrogen, and cold
Acidity, salinity, low pressure, and light
Light, humidity, oxygen, and temperature
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4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Why Does Food Spoil and How Can You Stop It?
Aylisha Woodall
@awoodall302
Food Safety and Storage Comprehensive Guide - A detailed exploration of why does food spoil and how to prevent it, food storage methods, and cooking impacts on nutrition.
• Understanding food spoilage through microorganisms including bacteria, yeast, and molds... Show more
Food Storage Guidelines
Proper food storage is crucial for maintaining food safety and preventing spoilage. This section details specific storage requirements for different food types.
Highlight: Refrigerator temperature should be maintained between 0-6 degrees Celsius.
Definition: Ambient foods are those stored at room temperature in a cool, dry place.
Storage methods for preventing microorganism growth include:
- Freezing at -18 degrees Celsius for long-term storage
- Drying to remove moisture
- Sugar preservation
- Vacuum packing
- Pickling in brine or vinegar
Example: Meat and poultry must be stored on the bottom shelf of the refrigerator and defrosted fully to ensure proper food safety.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Local Produce and Farming Methods
This section examines the advantages of local produce consumption and different farming approaches.
Highlight: Local produce offers multiple benefits including reduced CO2 emissions and support for local economies.
Definition: Sustainable fishing involves maintaining adequate fish populations while protecting marine habitats.
Example: Local caught ingredients include:
- Mackerel
- Haddock
- Mussels
- Scallops
Comparison of farming methods:
- Organic farming: Uses fewer chemicals but yields lower production
- Conventional farming: Higher yields but more intensive use of pesticides
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Cooking Methods and Nutrient Preservation
This section details various cooking methods and their effects on nutrient retention.
Highlight: Different cooking methods have varying impacts on nutrient preservation and sensory qualities.
Example: Water-based cooking methods:
- Boiling: Greatest nutrient loss
- Steaming: Better vitamin retention
- Blanching: Helps preserve color and nutrients
- Poaching: Can lose up to 50% of vitamin C
Definition: Dry cooking methods like stir-frying can preserve nutrients while improving flavor and color.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Food Safety Principles
This comprehensive section covers essential food safety guidelines and high-risk food management.
Definition: High-risk foods are those prone to bacterial growth if not properly stored, prepared, or cooked.
Vocabulary: Key food safety terms:
- Use-by date: Strict consumption deadline
- Best-before date: Quality indicator
- Enzymic browning: Natural food deterioration process
Example: High-risk foods include:
- Cooked meat and fish
- Dairy products
- Shellfish
- Gravies and sauces
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Kitchen Safety and Hygiene
This section outlines essential kitchen safety practices and proper food handling procedures.
Highlight: Proper use of color-coded chopping boards:
- Green: Salads and fruits
- Blue: Raw fish
- Red: Raw meat
- Brown: Vegetables
- Yellow: Cooked meats
- White: Dairy and bakery
Definition: Raising agents include:
- Baking powder
- Eggs
- Yeast
- Steam
Example: Essential kitchen hygiene practices:
- Hair restraint
- Proper apron use
- Regular surface sanitization
- Proper hand washing
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Food Spoilage and Microorganisms
This section explores the fundamental causes of food spoilage and the role of various microorganisms. Food deterioration occurs through multiple factors including environmental conditions and microbial activity.
Definition: Pathogens are organisms that cause disease to their host, playing a significant role in food spoilage.
Highlight: Key factors contributing to food spoilage include oxygen, heat, light, humidity, temperature, and improper ventilation.
Example: Common signs of food spoilage include changes in color, texture, unpleasant odor, and undesirable taste.
Vocabulary: Microorganisms in food spoilage include:
- Bacteria: Single-cell organisms causing decomposition
- Yeast: Responsible for spoiling items like bread
- Molds: Affect various food products including dairy and fruits
Which characteristic is a common indicator of food spoilage, according to the provided text?
Smoother texture
Brighter colour
Increased sweetness
Unpleasant odour
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user