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Environment

NIOS · Class 10 · Home Science

Quick revision notes for Environment — NIOS Class 10 Home Science. Key concepts, formulas, and definitions for last-minute revision.

44 questions38 flashcards5 concepts

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Key Topics to Revise

1

Core Ideas and Definitions

  • Pollution means adding unwanted substances to the environment in excess of normal levels.
  • A pollutant is a substance in the wrong amount, at the wrong place, or at the wrong time.
  • The environment can be polluted by air, water, soil, and noise.
2

Air Pollution

  • Oxygen is the most important component of air.
  • Human beings and animals breathe in oxygen and breathe out carbon dioxide.
  • Plants take in carbon dioxide and give out oxygen during the day.
3

Water Pollution

  • Safe drinking water has no taste, smell, colour, dirt, or germs.
  • Polluted water may be coloured, may have suspended particles, a foul smell, and a bad taste.
  • Domestic wastes, industrial wastes, agricultural wastes, and oil spills are sources of water pollution.
4

Soil Pollution and Waste Disposal

  • Soil pollution is a change in the physical, chemical, and biological nature of soil harmful to humans and other living beings.
  • Some chemicals can make soil totally infertile.
  • Excess insecticides, pesticides, and fertilizers can enter plants, fruits, and vegetables and then reach the human digestive system, causing sickness.

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Full Notes

Key Concepts

Pollution is the addition of unwantedAir pollution is caused by smokeWater pollution happens when domestic wastesSoil pollution is a harmful changeAny unpleasant sound is called noise

Frequently Asked Questions

What are the important topics in Environment for NIOS Class 10 Home Science?
Key topics in Environment include Flowchart showing decision tree for evaluating pollution control measures, Mind map for structuring personal environmental resolution with actions, methods, motivations, and support, Types of Pollution and Their Sources. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Environment — NIOS Class 10 Home Science?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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