Methods of Heat Transfer
_____________________ - When the two objects actually ______________. This is the best method.
_____________________ - Through a _____________________ of _______________.
_____________________ - Energy leaving in the form of an __________________________________ (such
as light). ______________________ is the slowest form, but it is impossible to stop.
Conductors and Insulators
_____________________ - Materials that allow heat to ____________ pass throughout the material (such as
____________).
_____________________ - Materials that ______________ allow heat to quickly pass throughout a material
(such as ____________ or _____________).
–This mainly deals with the movement of __________________.
– _____________________have a “sea of electrons” that allows for quick heat transfer.
Thermos
A thermos is a container that is capable of keeping hot items _________ and cold items ________.
You probably had a cheap one when you were younger in your lunchbox.
You can buy better ones that keep beverages hot or cold much ______________.
A thermos (or a cooler or even an insulated cup) works by _________________ transfers of heat!
How a Thermos Works
You have a jar inside a jar.
Good ones have a ________________ (nothing) in between the jars.
Cheap ones have ________________ in between.
Why Metals Feel Cool to the Touch at Room Temperature
Room temperature is _________________ than human body temperature.
_______________ is ONLY noticed when there is a ________________!
______________quickly _____________ heat from your body throughout the metal (since it is taking heat, it
feels cold).
Wood and plastic don’t _____________ heat quickly, so not as much is taken from your skin.
Good __________________ normally have a lot of space for _________, because ___________don’t conduct
as well as ________________.
Convection and Radiation
The sun ________________ heat in the form of ________________ toward the planet.
This heats the surface, which __________________ heat to the air it touches.
The hot air ________________ and begins to ____________.
_________________ air fills the void the hot air left.
The air begins to _____________________. The circulation is ________________; light (energy) is
_______________
Fluid Movement
Cooler, more ___________, fluids ___________ through warmer, ___________ dense fluids.
In effect, warmer _____________ and ______________rise up.
Cooler _________________ and __________________ sink.
Water Movement
Describe what’s happening in the animation.
Why is it windy at the seaside?
Radiation
How does _______________________ get from the Sun to the Earth?
There are no ________________ between the Sun and the Earth so it ________________ travel by
____________________ or by ____________________.
Answer: _______________________
Radiant Energy
________________________ can be ___________________ light, but can also be a large
_________________of objects such as …