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Do all substances change from solid to l...

Do all substances change from solid to liquid and liquid to gas on heating ? Explain.

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NCERT TELUGU-MATERIALS & THINGS-EXERCISE
  1. Now, cover the torch glass with your palm. What do you observe?

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  2. Now, cover the torch glass with oily paper. What do you observe?

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  3. Do all substances change from solid to liquid and liquid to gas on hea...

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  4. Did the candle not catch fire from a distance?

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  5. Does the white smoke represent candle wax in the state of gas?

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  6. What must she have argued using only one crystal or sugar and one drop...

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  7. What do you observe regarding excessively salty water?

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  8. Do you get the same result if the conical flask is not closed?

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  9. Objects which can be broken easily………

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  10. Write few properties of materials.

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  11. Compare the following properties of solids, liquids and gases. a) Shap...

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  12. Explain the terms 'soluble' and 'insoluble' with reference to water.

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  13. Here some materials are given. Name the materials from which each obje...

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  14. Explain the terms ‘Transparent’, ‘opaque’ and ‘Translucent’ giving wit...

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  15. How do we decide which material should be used for making an object?

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  16. How do you sort materials as solids, liquids and gases ? Write your an...

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  17. Name any five objects which are made up of more than two materials.

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  18. The shoes are made up of the following material:

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  19. The effect of light shining on an object results in ………………… of object.

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  20. A material which is not shiny.

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