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.

How to study this topic

Read the core explanation once without solving.
Open the formula links below and connect them with the topic meaning.
Practice the 10 example pages one by one.
Use the AI ask page for text, voice or image-based doubts.

10 example pages

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.