Three methods are drying, refrigeration and oiling. Drying removes moisture (e.g., chillies), refrigeration slows microbial growth (e.g., milk) and oiling blocks air (e.g., pickles), keeping food safe and fresh for longer periods. Class 5 EVS Textbook Our Wondrous World Chapter 3 ...
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Idlis are made by soaking rice and urad dal, grinding them into batter and letting it ferment. Fermentation by microbes makes the batter fluffy, which is then steamed into soft idlis. Class 5 Our Wondrous World Chapter 3 The Mystery of ...