Heat Transfer
Heat through contact
conduction
What you change
independent
What shows energy transfer
Temperature change
In our solar oven project, where can we find conduction?
Inside the system, alluminum foil to the thing we wanted to melt
Thermos / water bottles are an example of?
Reduces heat transfer, insulation
Heat through movement of fluids or gases
convection
What you measure
dependent
Larger ΔT means
More heat transfer
Whats outside our heat transfer system
Cardboard, sun, surroundings
Metal spoon heats fast
Through conduction, metal is a good conductor
Heat through space (no matter)
radiation
What stays the same
control
In a hot system, where energy goes?
Out of the system, leaves the system
in a system...energy can move...
inside, leave, or move between objects
Sun heating Earth is an example of?
radiation
Which heat transfer happens fastest in metals?
conduction
In our heat project, what was usually the dependent variable?
Temperature change (ΔT) or time
If temperature does not change, what can we say?
There was little or no energy transfer
If heat leaves your system, what happens to temperature?
It decreases
Wearing layers of clothing helps because
It reduces heat transfer (insulation)
Warm air rising and cool air sinking is an example of
convection
If you test two variables at the same time, your experiment becomes
Invalid / not valid; inconclusive
Why do scientists repeat measurements?
To make results more reliable
If an ice melts it means energy?
enter the ice/system
A black surface heats faster than a white one because
It absorbs more radiation