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CBSE - VI - Science
7. P, Q and R are the three gaseous components of air. Gases P and Q can dissolve in the water of rivers, lakes and seas but gas R does not dissolve in water. The organisms S which live in water use the gas P dissolved in water to make their food by the process of photosynthesis. All the organisms which live in water use the gas Q dissolved in water for releasing energy from food. Gas R is the major component of air. (a) What are gases (i) P (ii) Q and (iii) R? (b) Name the organisms S. (c) Name a gas like R which does not dissolve in water.
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Browse free questions and answers Chapters
- 1 Food: Where Does It Come From?
- 2 Components of Food
- 3 Fibre to Fabric
- 4 Sorting Materials into Groups
- 5 Separation of Substances
- 6 Changes Around Us
- 7 Getting to Know Plants
- 8 Body Movements
- 9 Living Organisms and Surroundings
- 10 Motion and Measurement of Distances
- 11 Light, Shadows and Reflections
- 12 Electricity and Circuits
- 13 Fun with Magnets
- 14 Water
- 15 Air Around Us
- 16 Garbage In, Garbage Out
