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In this Class 9 Science topic, students explore how human activities influence Earth’s interconnected systems—atmosphere, hydrosphere, geosphere, and biosphere. Building on the chapter Earth as a System: Energy, Matter, and Life, they examine how energy and matter move through natural cycles and how pollution, deforestation, urbanisation, intensive resource use, and greenhouse-gas emissions can disrupt them. The topic also develops understanding of evidence-based environmental change, its effects on living systems, and practical approaches to conservation and sustainable living.
Easy · Level 1 · 1 questions
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Waste and pollution increase
Soil fertility immediately increases
It easily biodegrades and enriches the soil
Tree growth becomes faster
Question 1EasyLevel 1
What problem is commonly caused by single-use plastic?एकल-उपयोग प्लास्टिक से सामान्यतः कौन-सी समस्या उत्पन्न होती है?
Correct answer:सही उत्तर:A
Single-use plastic is often used briefly and then discarded, but many common plastics persist for a long time in the environment. Poor disposal can block drains, harm animals, and add land or water pollution. It does not normally biodegrade quickly into soil-enriching material, increase fertility immediately, or speed tree growth. Reducing, reusing, and properly managing plastic can limit these impacts.एकल-उपयोग प्लास्टिक का उपयोग थोड़े समय के लिए होता है और फिर उसे फेंक दिया जाता है, जबकि सामान्य प्लास्टिक लंबे समय तक पर्यावरण में बना रह सकता है। गलत निपटान से नालियाँ बंद हो सकती हैं, जीव-जंतुओं को नुकसान हो सकता है तथा भूमि और जल प्रदूषण बढ़ सकता है। यह सामान्यतः जल्दी जैव-अवक्रमित होकर मिट्टी को उपजाऊ नहीं बनाता।
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