CHAPTER 2
Is Matter Around us Pure
CLASS :-IX
FILL IN THE BLANK
1. The smell of perfume gradually spreads across a room
due to ..........
2. As the volume of a specific amount of gas decreases,
it’s pressure ..........
3. Rapid evaporation depends on the .......... area exposed
to atmosphere.
4. As the temperature of a system increases, the pressure
of the gases ...........
5. Matter is made up of small ...........
6. Liquids that move quickly downhill are described as
having ..........
7. The forces of attraction between the particles are in
solids, ......... in liquids and .......... in gases.
8. Forces of attraction in liquids are .......... than in solids.
9. .......... is the change of gaseous state directly to solid
state without going through liquid state, and viceversa.
10. The pressure inside a sealed tube, if you raise the
temperature go ..........
11. Evaporation causes .........
12. Usually the total charge of a plasma is ..........
13. Latent heat of fusion is the amount of heat energy
required to change 1 kg of solid into liquid at its ..........
14. Gas molecules at higher temperatures have more
.......... than at cooler temperatures have more ..........
than at cooler temperatures.
15. Solid, liquid and gas are called the three .......... of
matter.
16. As the temperature of a gas decreases, its volume
.........