CLASS 9 SCIENCE MATTER IN OUR SURROUNDINGS

MATTER IN OUR SURROUNDINGS

1.      What is matter? Give four examples.

2.      Write four characteristics of matter.

3.      Define three states of matter with four examples for each.

4.      Write five properties for each solid ,liquid and gas.

5.      Illustrate diffusion with an example.

6.      Convert following into Kelvin scale

a)330℃. b)30 ℃. c) 37 ℃ d) 0℃

7.      What is fusion process ? Give one example.

8.      Define vaporization with an example.

9.      Define boiling point.

10.  Define condensation  with an example.

11.  Define freezing process with an example.

12.  What is sublimation ? Explain with two example.

13.  Draw the flow chart for change of state of matter.

14.  What is latent heat?

15.  During change in state.Why does temperature remain constant?

16.  Why does a gas completely fill its container in which it is kept?

17.  Ice floats on water even solid has higher density .Why?

18.  During summer we prefer to wear white clothes. Why?

19.  Why the water become cool when kept in earthen pot during summer  ?

20.  Why hot soup taste better rather than cold ?

21.  Why steam produce more burn than hot water ?