NCERT solutions for class 10th chapter 15 our environment
In text questions
Page no.257
1. Why are some substances biodegradable and some non-biodegradable?
Ans: Substance are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot.
Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganism into harmless substances are called non biodegradable substances.
2. Give any two ways in which biodegradable substances would affect the environment.
Ans: Biodegradable substances affect the environment by:
In text questions
Page no.257
1. Why are some substances biodegradable and some non-biodegradable?
Ans: Substance are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot.
Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganism into harmless substances are called non biodegradable substances.
2. Give any two ways in which biodegradable substances would affect the environment.
Ans: Biodegradable substances affect the environment by:
- The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility.
- The biodegradable substances mainly contain carbon. These substances after decomposition release that carbon back into the atmosphere.
3. Give any two ways in which non-biodegradable substances would affect the environment.
Ans: Non-biodegradable substances affect the environment by:
