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Snehal dug two pits, A and B, in her garden. In pit A, she put fruit and vegetable peels and mixed it with dried leaves. In pit B, she dumped the same kind of waste without mixing it with dried leaves. She covered both the pits with soil and observed after 3 weeks. What is she trying to test?
Snehal wanted to observe the role of dried leaves in composting. Pit A, containing both peels and dried leaves, promotes better aeration and balances nitrogen with carbon, speeding up decomposition. Pit B, without leaves, might decompose slowly and produce foul smells due to poor air circulation andRead more
Snehal wanted to observe the role of dried leaves in composting. Pit A, containing both peels and dried leaves, promotes better aeration and balances nitrogen with carbon, speeding up decomposition. Pit B, without leaves, might decompose slowly and produce foul smells due to poor air circulation and nitrogen overload. Her experiment tests how combining green and brown waste improves compost quality and efficiency.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessIdentify the following microorganisms: (i) I live in every kind of environment and inside your gut. (ii) I make bread and cakes soft and fluffy. (iii) I live in the roots of pulse crops and provide nutrients for their growth.
(i) Bacteria are found in all environments and help digest food in our gut. (ii) Yeast is used in baking; it ferments sugar and releases gas, making dough rise. (iii) Rhizobium bacteria live in the root nodules of legume plants, converting atmospheric nitrogen into forms plants can absorb. These micRead more
(i) Bacteria are found in all environments and help digest food in our gut.
(ii) Yeast is used in baking; it ferments sugar and releases gas, making dough rise.
(iii) Rhizobium bacteria live in the root nodules of legume plants, converting atmospheric nitrogen into forms plants can absorb. These microbes play essential roles in digestion, agriculture and food preparation.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessDevise an experiment to test that microorganisms need optimal temperature, air and moisture for their growth.
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 microorgRead more
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.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessTake 2 slices of bread. Place one slice in a plate near the sink. Place the other slice in the refrigerator. Compare after three days. Note your observations. Give reasons for your observations.
The bread near the sink becomes moldy because the warm, moist environment near the sink encourages microbial growth. On the other hand, the bread in the refrigerator stays mostly unchanged because low temperatures slow down or stop microbial activity. This experiment shows that warmth and moisture aRead more
The bread near the sink becomes moldy because the warm, moist environment near the sink encourages microbial growth. On the other hand, the bread in the refrigerator stays mostly unchanged because low temperatures slow down or stop microbial activity. This experiment shows that warmth and moisture are essential for microorganism growth and demonstrates how storage conditions affect food spoilage.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessA student observes that when curd is left out for a day, it becomes more sour. What can be two possible explanations for this observation?
When curd is left at room temperature, especially in warmth, bacteria like Lactobacillus multiply quickly. They convert the lactose in milk into lactic acid, which gives the curd a sour taste. The longer it's left out, the more acid forms, making it more sour. This is a clear example of microbial acRead more
When curd is left at room temperature, especially in warmth, bacteria like Lactobacillus multiply quickly. They convert the lactose in milk into lactic acid, which gives the curd a sour taste. The longer it’s left out, the more acid forms, making it more sour. This is a clear example of microbial activity changing the taste and composition of food naturally.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See less