Q14. Write any two objects made up of opaque materials.

 

Q15. What is common between oil and water?

 

Q16. Write two things made from leather.

 

Q17. Write name of any three metals.

 

Q18. Name few things made up of plastic.

 

Q19. Why water is considered as a universal solvent?

 

Q20. Why does a coin sink in water?

 

Q21. Why are cooking utensils made of metal but their handles of plastic or wood?

 

Q22. Why oil does not dissolve in water?

 

Q23. Why some material loses their shine and appears dull?

 

Q24. We can group things in more than one way. Explain.

 

Q25. Oxygen and carbon dioxide are slightly soluble in water. What is the importance of each of these gases in nature?

 

Q26. Define density. How is it related to floating and sinking in water?

 

Q27. Why does sugar dissolve in water?

 

Q28. Why in departmental stores all brands of shampoos and soaps are kept together while all pulses and kitchen items are kept at one place?

 

Q29. What is classification?

 

Last modified: Friday, 4 January 2019, 7:07 PM