Matter In Our Surroundings-Sample Papers

1.  Camphor disappears without leaving any residue. Explain?                                                                                      (2)

2.  Why do we feel cool when we touch a piece of ice?                                                                                                        (2)

3.  What is Latent Heat of Fusion?                                                                                                                                                (2.5)

4.  Define latent heat of Vaporization?                                                                                                                                        (2.5)

5.  How can you show that evaporation causes cooling?                                                                                                       (3)

6.  How can you justify that table is a solid?                                                                                                                             (3)

7.  Arrange the following in decreasing order of force of attraction: Water, Salt, Oxygen, and give reasons.             (3)

8.  What are the characteristics of matter?                                                                                                                                             (3)

9.  The smell of hot sizzling food reaches you several meters away, but to smell the cold food you have to go close. Why?                    (3)

10.  After rains, the rain drops dry away easily- on a sunny day or on a cloudy day? Give reasons.                    (3)

11.  How can matter change its state?                                                                                                                                                        (3)