Place moist bread slices in three conditions: warm air, cold fridge and sealed airtight. After three days, compare mold growth. Mold grows best in warmth with air and moisture, proving microbes need these conditions.
Class 8 NCERT Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye solutions
class 8 science chapter 2 the invisible living world beyond our naked eye question answer
Take three bread slices. Keep one in a warm place, one in the fridge and one in an airtight container. All should be slightly moist. Observe after three days. You’ll find mold growing fastest in the warm, airy place. Little or no growth happens in the cold or airtight conditions. This shows microorganisms grow best when temperature, air and moisture are at optimal levels.
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Place moist bread slices in three conditions: warm air, cold fridge and sealed airtight. After three days, compare mold growth. Mold grows best in warmth with air and moisture, proving microbes need these conditions.