Is this Conduction, Convection, or Radiation:
The top floor of a building is the warmest.

convection

Explanation:

hot air rising is a common example of heat convection

Radiation

Explanation:

Radiation is like for example the sun gives out the radiation from it's heat and for the example you have the heat from the stove is warming the house up from it's radiation waves.

it breaks and dirupture other materials and other sencews from the bottom

gas and liquid