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Filter

Comprehensive notes, formulas, and practice questions for Filter.

Filter

Filtering Water

NCERT anchor

Looking Around 2Water. Cleaning muddy water with cloth filters is a hands-on activity in the Water chapter.

What you'll learn

  • Dirty water has mud and bits we can see.
  • Filtering removes insoluble dirt through cloth or filter.
  • Filtered water may still need boiling.

Key concepts

Verbal: Filtering traps visible dirt — mud and leaves stay on the cloth; clearer water passes through.

Symbolic: Settle → pour → filter. Removes: mud, sand. May NOT remove: tiny germs (need boiling).

Level 1 — What is filtering?

Pass water through cloth, paper, or sand filter — dirt stays behind.

Level 1 — Home methods

Muslin cloth over vessel; matka water with candle filter (intro).

Level 1 — What filtering removes

Mud, sand, leaves — visible dirt.

Level 2 — What it may NOT remove

Tiny germs (need boiling or UV).

Level 2 — India

Jal Jeevan Mission — clean tap water; village pond water filtered at home.

Worked example

How would you clean muddy water from a puddle?

Step 1 — Let mud **settle** at bottom.
Step 2 — Pour top water through **clean cloth**.
Step 3 — Cloth traps mud particles.
Answer: Settle, then filter through cloth.

Common mistakes

MistakeWhyFix
Filter removes all germsSize too smallStill boil for safety
Stirring helps filterMixes mudLet settle first
Any dirty cloth worksAdds germsUse clean filter

Quick check

  • What does a filter catch?
  • Filter or boil — which kills germs?
  • Name material used to filter at home.

Stretch: After filtering pond water, is it safe to drink? What extra step would Amma add?

Revision tip: Try a home demo: mix mud in water, settle, filter through muslin — draw before/after sketches.

Open the Practice tab for graded questions on Filtering Water.

Interactive Exploration Suggestions (Drishti Live Worlds)

  • Use the platform-native live simulation or PhET-style tool for this topic (number line, Venn, physics playground, molecule builder, sensor dashboard, etc.).
  • Mirror / body / home activity: physically do the concept (count objects, measure, role-play) and photograph or describe for portfolio.
  • Voice or text reflection with AI Mentor: explain the concept to a younger student or family member.

AI Mentor Prompts (Socratic, Board-Adaptive)

  • "Explain this concept to a Class 6 student using one real example from an Indian home, school, market, or festival."
  • "What is one common mistake students make here, and how would you catch yourself making it?"
  • Stretch: "How does this connect to coding, robotics, money, health, environment, or a future career?"

Gamification, Portfolio & Parent Visibility

  • Complete the core practice + one extension activity (photo, table, short reflection, or mini-project) for base XP + topic badge.
  • 5-7 day streak or family discussion note = multiplier + visible artifact in parent/principal dashboard.
  • Best real-world application stories (anonymised) featured on class or national leaderboard.

Robotics, STEM & Future Skills Bridges

  • One hands-on project or measurement using the Drishti kit or household items that makes the concept physical.
  • Direct link to at least one Future Skill track (Money Management, Green Tech, Cyber Defenders, Micro-Entrepreneurship, AI Mastery, Sustainable Living, Personality Development).
  • Coding extension where relevant (simple script, simulation, or data logging).

NEP 2020 & Full Education OS Alignment

This material emphasises experiential "learning by doing", competency (apply/create/analyse), vocational exposure, critical thinking, and multidisciplinary connections. Designed to feed live worlds, AI Mentor (with memory), gamification, robotics, parent analytics, and future skills — not just exam prep.

Portfolio Evidence Idea: Your photo/table/reflection/project + one sentence on "How this helps me in real life or a possible future path."

Open the Practice tab for aligned questions (easy/medium/hard + case-based) with full AI scaffolding.

See curriculum for cross-links and the full future-skills/robotics chapters.

Key Takeaways (TL;DR)

  • NCERT anchor
  • What you'll learn
  • Key concepts
  • Worked example

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