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State the three ways that thermal energy can be transferred.
a) Conduction happens mostly in solids.
Metals are good conductors.
Convection currents happen in liquids only.
Thermal energy is transferred from hotter objects to colder objects.
Only hot objects emit infrared radiation
Describe why gases are good insulators.
Describe how a convection current forms.
Describe how conduction transfers thermal energy.
State which colour of object absorbs infrared radiation the best.
Describe what a vacuum is.
Describe what a conductor is.
State which type of thermal energy transfer allows the Earth to be heated by the Sun.
What are the three ways that thermal energy can be transferred?
How is thermal energy transferred between objects?
What occurs primarily in solids during conduction?
What are conductors and can you provide an example?
What defines a good insulator and give an example?
Why are gases such as air considered good insulators?
Why is conduction not possible through a vacuum?
Where does convection occur and how does it work?
What is a convection current?
Describe how a convection current works using an example.
How do objects emit radiation and what forms does it take?
Why can infrared radiation travel through a vacuum?
How does thermal radiation from the Sun reach Earth?
Which surfaces absorb the most infrared radiation and which reflect it?