gases state

Gaseous State :

ACTIVITY

Blow different shapes of balloons. Have these balloons become heavier or lighter than the uninflated balloon?

Lit the essence stick in corner of room, see whether the smell comes in other corner. Why?

SUBLIMATION

ACTIVITY

.   Leave 2 pieces of camphor exposed in air for few days. Observe change in its size.

.   Why the napthalene  balls are kept in toilets?

SOMETIMES SOLIDS GO DIRECTY INTO GASEOUS STATE WITHOUT GOING IN LIQUID STATE . THIS PROCESS IS KNOWN AS SUBLIMATION .