Class 5Environmental StudiesMangoes Round the Year
Methods of Food Preservation
1. Pickling: add salt/oil/vinegar (creates acidic environment — bacteria cannot survive). Mango, lemon, chilli pickle. 2. Drying/dehydration: remove water (bacteria need water). Sun-dry tomatoes, chilli, fish, papads. 3. Freezing: low temperature slows bacterial growth. 4. Pasteurisation: heat milk to 72°C for 15 seconds — kills harmful bacteria (Louis Pasteur invented in 1864). 5. Canning: food sealed in airtight tin, heated to kill bacteria — lasts years.
10 examples
Concept check 1
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on concept check and show the working clearly.
Definition to application 2
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 5 Environmental Studies, explain or solve a methods of food preservation question from the chapter "Mangoes Round the Year". Focus on exam recap and show the working clearly.