Worksheet 2

1.
Which material should Tania and Ravi use for making an object that is water resistant and do not conduct heat or electricity?
1. Aluminium
2. Rubber
3. Silver
4. Cotton
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Answer:
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Tania and Ravi should use (b) Rubber.Reasons: Rubber is wate...
2.
Tania and Ravi have to demonstrate the process of evaporation in the class. They need a vessel for this activity. What should the vessel be made of?
1. Aluminium
2. Rubber
3. Paper
4. Cotton
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Answer:
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The vessel should be made of (a) Aluminium. Aluminium is str...
3.
Tania has no design metallic jewellery with the material that has best lustre. Which material would be her best choice?
1. Aluminium
2. Silver
3. Paper
4. Cotton
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Answer:
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Tania’s best choice would be (b) Silver. Silver has the be...
4.
Ravi has been given the task for making a box into which no light should enter. Which materials should be not use for making this box?
1. Silver, rubber, and aluminium
2. Cotton, nylon, and glass
3. Aluminium, rubber, paper
4. Silver, rubber, and paper
5.
If 500 balls of cotton are needed to get yarn for making six dozen towels, how many balls of cotton would be needed to get a yarn for a 100 towels?