A student observes that when curd is left out for a day, it becomes sourer. What are two possible Class 8

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Science Class 8 Science 137 views May 06, 2026 Reviewed & updated Sep 17, 2026
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A student observes that when curd is left out for a day, it becomes sourer. What are two possible Class 8

A student observes that when curd is left out for a day, it becomes sourer. What are two possible explanations for this observation? Class 8

Answer:

  1. Microorganisms (lactic acid bacteria) continue to grow and multiply, producing more lactic acid, which makes the curd sourer.
  2. Warmer temperature speeds up bacterial activity, increasing acid production and sourness.

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