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Question
A notebook has lustre while an eraser does not.
Options
True
False
Solution
This statement is False.
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RELATED QUESTIONS
Very Short Answer Type Question:
Why do we need to group materials? Give one reason.
Short Answer Type Question:
Mention some materials which are made up of paper.
Match the objects that are made of the same material.
| A | B | C |
 |
 |
 |
 |
 |
 |
 |
 |
 |
Sort the given objects as rough or smooth.
| Wet soap | Coir | Feather | Stone |
| ______ | ______ | ______ | ______ |
| Glass ball | Paperboard | Sand paper | Plastic spoon |
| ______ | ______ | ______ | ______ |
Sugar does not dissolve in water.
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.
While doing an activity in class, the teacher asked Paheli to .handover a translucent material. Which among the following materials will Paheli pick and give her teacher?
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?
Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.
