Worksheetsclass 8 ICSE HEAT
Total questions: 10
Worksheet time: 8mins
In gases increase in volume is directly proportional to its original
Length
Breath
Height
All
Mechanical clocks have pendulum which are made up of alloy of iron and nickel called as
Brass
Alnico
Invar
Steel
The increase in length of a rod on heating depends on
its initial length
its rise in temperature
its material
all the above
Why does a piece of ice when touched with hand appear cold?
Because ice loses heat to hand.
Because hand loses heat to ice.
Because on touching ice, it melts to water at 0oC.
Because temperature of ice is very low.
Conversion of ice into water is an example of
Evaporation
Freezing
Sublimation
Melting
The process in which a substance changes its state from liquid to vapour state at fix temperature
Boiling
Freezing
Sublimation
Evaporation
The process in which a substance changes its state from liquid to vapour state at all temperature is
Boiling
Freezing
Sublimation
Evaporation
If on heating a solid, the increase in breadth and thickness is negligible (or radius) as compared to length, it is called as
Superficial expansion
Volume expansion
Linear expansion
Liquid expansion
Which of these process involves all the atoms and molecules
Evaporation
Boiling
Both
None
Which of these process is a surface phenomenon
Evaporation
Boiling
Freezing
Cooling
