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Transfer of Thermal Energy - Coggle Diagram
Transfer of Thermal Energy
Radiation
Key Differences to Conduction and Convection
No particles Needed
Travels Through Vacuum
Feeling Heat From A Distance
Travel Without medium
Black Sand Vs. White Sand
Darker Colours Absorb More Radiation
The Suns heat that reaches the Earth is radiation
Black sand is Hotter than White sand
Definition
The Transfer of Thermal enrgy without the need of particles
Travels Through Electromagnetic Waves
Types:
Visible Light
Travels through Lower Frequency of Waves
Ultraviolet (UV)
Causes Sunburn as the Radiation Kills your Skin Cells
Infrared (IR)
The Heat you Feel from a Fire
Absorbtion and Reflection
Darker Dull Surfaces absorb
Solar Panels, Black Jacket
Lighter Surfaces Reflect
White Sand, White Car
Infrared Radiation (IR)
Invincible
Can be Detected by Special Cameras (heat camera)
Carries Heat
Given Off by all Objects with Heat
The More Radiation the Hotter the Temperature
Occurs in all Directions
Convection
Definition
Transfer of thermal energy through the movement of particles from one location to another
Only occurs in fluids
Gas
Liquids
Mechanism
When fluid gets warmer:
Particles gain kinetic energy
They move faster
The move further apart
There is a decrease in density
Less dense regions of fluid rise if fluid above it is cooler
conduction
Definition
Transfer of thermal energy
direct contact between particles
particles do not move location
mechanism
Thermal Energy
Deffinition
Internal Energy
Partical movment
Hot vs Cold
Hot
High Thermal Energy
Fast Partical Movment
Cold
Low Thermal Energy
Slow Particle Movement
Energy Transfer (Heat)
Object Heated
Thermal Energy Transfer to an Object
Example: Coffee and Milk
Heat from Coffee to Milk
Milk Warms
Coffee Cools
Temperature
Describes How Hot
Related to Thermal Energy
Not a Form of Energy