Question

3 Give an example for each of the
following:
a. Condensation
b. Sublimation
c. Chemical change
d. Expansion
e Contraction
​

Answer 1

Answer:

condensation= moisture beeds on car windows

sublimation= dry ice

chemical change= rusting of iron

expansion= water expands on heating

contraction= hot glass tumbler cracks under cold water

Answer 2

Answers:

Having a cold soda on a hot day ,the can sweats water molecules in the air as a vapour hit the colder surface of the can and turn into liquid water called condensation.

Dry ice, heavy CO2 called sublimation.

When the wood burn it turn into ash called Chen change.

Railway tracks consists of two parallel metal rails joined together.Small gaps called expansion.

Thermometer work because the liquid inside them expand and rises up the tube when it gets hotter called contraction.