The transfer of energy that occurs when molecules bump into one another is called
a. radiation
c. convection
b. conduction
d. condensation

Conduction is the form of energy that is produced when molecules collide. Conduction is the process of heat or electricity transfer via a difference in potential energy.

Option (b) is the correct answer.

Explanation:

When we place two objects of different temperature adjacent to each other then there will occur transfer of heat from hotter object to colder object till their temperature becomes equal.  

This process is known as conduction.

For example, a metal spoon placed in hot coffee cup then heat will flow from coffee to the cup.

Convection is defined as the process in which a fluid (liquid or gas) when heated then more dense (cooler) substance sinks ate the bottom whereas less dense (hotter) substance will rises at the top.  

This intermixing of the substances tends to generate convection currents and this process is known as convection.

Radiation is defined as an electromagnetic energy which travels in space in the form of waves or particles.

Thus, we can conclude that the transfer of energy that occurs when molecules bump into one another is called conduction.

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