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NCERT Class 10 Science Our Environment: In-text questions (page 216) Solutions
AI-written, checked on 23 Oct 2026
Solutions written by Shishya, checked — not the board's official answers
Step-by-step working for every question of In-text questions (page 216) in NCERT's Class 10 Science book, chapter “Our Environment”, written by Shishya. Each question is in our own short words; open the NCERT chapter for the exact wording and figures.
How these were checked: the solutions were drafted with AI and then read and corrected on 23 Oct 2026. Every numerical final answer is recomputed from the question's own numbers by a calculator check that runs before each release; proofs and explanations were read, not machine-checked. The NCERT textbook is the authority — if something here disagrees with it, follow the book.
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In-text (page 216) Q1
What is ozone and how does it affect an ecosystem?
- Ozone is a molecule made of three oxygen atoms, written as O₃.
- It is found in the stratosphere, which is a layer of the atmosphere high above the Earth's surface.
- This layer of ozone is called the ozone layer.
- The ozone layer absorbs harmful ultraviolet (UV) rays coming from the Sun.
- These UV rays can cause skin cancer, cataracts, and harm crops and marine life.
- By blocking these rays, the ozone layer protects living organisms and maintains the balance of the ecosystem.
- If the ozone layer gets damaged, more UV radiation reaches the Earth, which disrupts the ecosystem.
Answer: Ozone is O₃; it protects the ecosystem by absorbing harmful UV radiation from the Sun.
In-text (page 216) Q2
How can you help reduce the problem of waste disposal? Give two methods.
- Practice the 3R principle: Reduce, Reuse, and Recycle to minimize waste generation at the source.
- Reduce: Consume less by avoiding single-use plastics and buying only what is necessary.
- Reuse: Use items multiple times, such as carrying cloth bags for shopping or using glass bottles instead of plastic ones.
- Recycle: Separate waste into biodegradable and non-biodegradable categories to facilitate proper processing and recycling.
- Compost organic waste like food scraps and garden waste to create manure, which reduces the load on landfills.
- Educate others about waste segregation and proper disposal methods to create a collective impact.
- Support local recycling initiatives and use products made from recycled materials to promote a circular economy.
- Avoid food waste by planning meals carefully and storing food properly to extend its shelf life.
- Use eco-friendly products that are biodegradable or easily recyclable to reduce long-term waste accumulation.
- Participate in community clean-up drives and waste management programs to maintain a clean environment.
Answer: (i) Practice the 3R principle (Reduce, Reuse, Recycle); (ii) Compost organic waste and segregate waste for proper recycling.
Other exercises in this chapter
- In-text questions (page 212) — 2 questions
- In-text questions (page 214) — 3 questions
- End-of-chapter exercises — 9 questions
← Our Environment: notes, practice and all exercises
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