Convection

Convection

by Arlita Daniels

​Objectives:

​1. Describe the process of Convection

2. Explain how heat is transferred in fluids.

​Convection

​- is the way in which heat is transferred through fluids (liquids and gases) by movement of particles themselves

​

​- when particles are heated they expand and get less dense and rise; the cooler the particles get they contact become more dense and sink.

​

​- the constant circulation of hot (warm) particles moving upwards and the cooler particles moving downwards is called CONVECTION Currents.

​Video on Convection Currents

​https://www.youtube.com/embed/0mUU69ParFM

​Hot air rises, Cool air Sinks

​Convection in an Oven 

​Convection Currents :sea and land breeze

Multiple Choice

Conduction is the transfer of heat energy by

• Molecular contact

• Movement through a Vacuum 

• Electromagnetic Waves

• Density differences

Multiple Choice

The collision of molecules within a fluid results in the transfer of energy by

• Convection

• Insulation

• Insolation 

• Conduction 

Multiple Choice

During which process of energy exchange does cold air displace warmer air?

• Absorption

• Convection

• Radiation

• Conduction

Multiple Choice

The process by which air flows from one location in the atmosphere to another is called

• Conduction

• Absorbption

• Radiation

• Convection 

Multiple Choice

During which process does heat transfer occur because of density differences?

• Conduction

• Reflection

• Radiation

• Convection