M.M: 30 marks Dated: 27/07/2011
Time: 40 minutes
Q 1: Why a tumbler is not made of paper or cloth? (1 mark)
Q 2: On what two criteria, do we choose a material for making an object? (2 marks)
Q 3: What do you understand by lustre? Name two substances that have lustre. (2 marks)
Q 4: When will you call a material hard and when will you call it soft? Give two examples each of hard material and soft material. (3 marks)
Q 5: What will happen when you mix water with (3 marks)
- Sand?
- Chalk powder?
- Sawdust?
Q 6: What do you understand by transparent, translucent and opaque material? Give two examples of each. (6 marks)
Q 7: Write two materials that float on water and two materials that do not float on water. (2 marks)
Q 8: Pick the odd one out from the given materials and explain the reason for picking it. (1 mark)
Sugar, Salt, Sand and Copper sulphate
Q 9: Give one example that shows that the property of oxygen mixing with water is useful? (1 mark)
Q 10: Write two liquids that are soluble in water and two liquids that are insoluble in water. (2 marks)
Q 11: Write two materials that are attracted by a magnet and two materials that are not. (2 marks)
Q 12: Write True or False for the given statements. Correct the false statements. (5 marks)
- A non glossy notebook has lustre while a new metallic spoon does not have lustre - __________
- Materials that allow heat to pass them are called insulators - _________
- Liquids that mix with water area called immiscible - ___________
- Clouds are an example of transparent material – __________
- Flour is soluble in water - __________
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