Mixing
Mixtures keep their properties — salt water, fruit salad.
Mixing
Mixing
What you'll learn
- A mixture combines two or more substances.
- Each part keeps its own properties — salt still tastes salty in water.
- Examples: salt water, fruit salad, sand and pebbles.
- Looking Around 3 kitchen mixing — lassi, pulao ingredients.
Key concepts
Level 1 — Core idea
Verbal: Stir salt into water — you get salty water, but salt and water are still both there.
Symbolic: Mixture = A + B (no new substance at Class 3 level).
Visual: Fruit salad: banana and apple pieces visible separately.
Level 2 — Going deeper
Homogeneous (same throughout — salty water) vs heterogeneous (you see parts — salad). Both are mixtures.
NCERT anchor
NCERT Looking Around 3, Chapter 6 (Food We Eat) mixes ingredients. Salt in dal is a mixture you can taste but not always see.
Worked example
Is salted water a mixture? Why?
Step 1 — Salt + water combined
Step 2 — Salt **dissolves** but does not vanish — taste remains
Answer: **Yes** — mixture
Fruit salad vs single apple — mixture or not?
Step 1 — Salad = many fruits **together**
Step 2 — Each fruit keeps its taste and look
Answer: **Mixture** (heterogeneous)
Common mistakes
| Mistake | Why | Fix |
|---|---|---|
| Dissolving = new substance | Clear water looks pure | Salt still there — mixture |
| Mixture same as single element | Water only thinking | Two+ substances → mixture |
| Mixtures always visible bits | Salt water counter | Some mixtures look uniform |
| Cooking always makes non-mixture | Heat confusion | Many cooked foods still mixtures |
Quick check
- Give two mixture examples.
- Does salt disappear in water?
- Is air a mixture?
- Stretch: Milk + chocolate powder — mixture before stirring?
Revision tip: Ask: "Can I still tell or taste both parts?" → often a mixture.
Open the Practice tab for graded questions on Mixing.
Key Takeaways (TL;DR)
- What you'll learn
- Key concepts
- Worked example
- Common mistakes
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