Filter
Remove visible dirt with cloth or filter.
Filter
Filtering Water
NCERT anchor
Looking Around 2 — Water. 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
| Mistake | Why | Fix |
|---|---|---|
| Filter removes all germs | Size too small | Still boil for safety |
| Stirring helps filter | Mixes mud | Let settle first |
| Any dirty cloth works | Adds germs | Use 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.
Key Takeaways (TL;DR)
- NCERT anchor
- What you'll learn
- Key concepts
- Worked example
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