Contents

Water Cycle:

The water cycle shows the continuous movement of water within the Earth and atmosphere.


Which of the following process/es is/are involved in water cycle?
a) sublimation                     

b) evaporation
c) condensation                  

d) both b and b


Which of the following is the source of heat for evaporation during water cycle?
a) geothermal heat                             

b) sun
c) natural gas                       

d) none of these


Which of the following is directly converted into gaseous phase from solid phase?
a) ice     

b) dry ice             

c) iron    
d) NaCl


When dry ice absorbs heat from its surrounding, it directly converts in gaseous state without changing into liquid phase. What is this process?
a) sublimation                    

b) evaporation
c) melting                                             
d) condensation


Exercise: