Change of solid into liquid on heating
Melting
Change of liquid into solid on cooling
Freezing
Change of liquid into vapour on heating
Evaporation
Change of gas into liquid on cooling
Condensation
cow dung is ------------ fuel.
solid
LPG is gas fuel.True OR False
True
petrol ---------------- fuel.
liquid
These are all solid fuels.Yes or No
Yes
These are all------------- fuels.
liquid
These are all gas fuels.True or False
True
--------- change their state as the ------- change.
matter,temperature
Giving off heat while burning are called
fuels
