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प्रश्न
Test the flexibility.
Give one plastic scale and a wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not bend).
| Plastic Scale | Wooden Scale |
| ______ | ______ |
उत्तर
| Plastic Scale | Wooden Scale |
| bends | does not bend |
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संबंधित प्रश्न
Very Short Answer Type Question:
Which material is generally used for making pens? Wood, aluminum, plastic, cotton
Long Answer Type Question:
‘Grouping of objects helps the shopkeeper.’ Justify the statement.
Choose the odd one:
Smooth materials do not have ups and downs.
Name some examples for shiny materials?
Match the substances in Column A with their applications given in Column B.
|
Column A (Substance) |
Column B (Application) |
| (a) oxygen | (i) for making crackers |
| (b) copper | (ii) for disinfecting water |
| (c) sulphur | (iii) all living beings inhale during breathing |
| (d) iron | (iv) for making electric wires |
| (e) chlorine | (v) for making rails |
Some of the following statements are incorrect. Find the incorrect statements and correct them.
- The property of metals by virtue of which they can be drawn into wires is called ductility.
- Metals are good conductors of electricity but poor conductor of heat.
- Articles made up of metals produce ringing sound when struck hard.
- Oxides of non-metals and metals are acidic in nature.
- A less reactive metal displaces a more reactive metal from its salt solution in water.
Which of the following materials is not lustrous?
Which of the following statements is not true?
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
