A) A ball hit by a rod
B) A surface marked by a nail
- ⋆⇢Leaves a mark on the surface for further use
C) A rock getting down into pieces by a hammer
- ⋆⇢To get smaller pieces of rock for various purposes
D) An electric circuit with a metal piece
- ⋆⇢The current will flow through it as metal is a good conductor of electricity
E) An electric circuit with a wooden piece
- ⋆⇢Wood doesn't conduct electricity hence ,no flow of electric current
F) A wooden and a metal rod being lighted upon a burning candle
- ⋆⇢The metal rod will turn into red colour while the wooden one will start burning after some times
