conduction
Definition
Conduction is the transfer of heat energy through a solid, liquid, or gas by direct contact.
This happens when the molecules in the material vibrate and collide with each other.
The heat energy is transferred from the molecules that are vibrating more to the molecules that are vibrating less.
The rate of conduction depends on the material, the temperature difference, and the surface area.
How can the word be used?
The electrical current was conducted through the copper wire.
Different forms of the word
Noun:
Conduction: The transfer of heat or electricity through a material by means of collisions between the particles of the material.
Adjective:
Conductive: Able to conduct heat or electricity.
Verb:
To conduct: To transfer heat or electricity through a material by means of collisions between the particles of the material.
Etymology
The word "conduction" comes from the Latin word "conductus", which means "to lead". It is made up of the prefix "con-", which means "together", and the verb "ducere", which means "to lead".
Question
Explain how conduction works.
AQA Science Exam Question and Answer
Question:
Define conduction in the context of heat transfer and provide an example to illustrate how it occurs.
Answer:
Conduction is a process of heat transfer in which heat energy is transferred through a material by direct molecular interaction. In this process, heat flows from a region of higher temperature to a region of lower temperature within the material, leading to an equalisation of temperatures over time.
An example of conduction is when you place a metal spoon in a cup of hot coffee. The heat from the hot coffee is conducted through the metal spoon's molecules, causing the spoon's handle to become warm. As a result of conduction, the heat is distributed evenly from the hot coffee to the entire metal spoon, making it possible for the handle to be warm to the touch.