Ch 10 - Transfer of Heat and its Effects Flashcards
Define Temperature.
Temperature is the degree of hotness or coldness of an object.
SI unit of temperature
Kelvin (K)
Common units of temperature
- degree Celsius (°C)
- Fahrenheit (°F)
Use of thermometers
To measure the changes in temperature resulting from the transfer of energy.
Heat is a form of…
ENERGYY 🔥🔥🔥
Fill in the blanks!!
Heat flows from a region of ____ temperature to a region of ____ temperature.
higher , lower
When two objects reach the same temperature.
THERMAL EQUILLIBRIUM
Transfer of heat can cause…
EXPANSION & CONTRACTION
What happens when a substance is heated?
When heated, the particles gain energy, move faster and further away from one another. Thus, the volume increases.
What happens when a substance is cooled?
When cooled, the particles lose energy, move slower and closer to one another. Thus, the volume decreases.
Processes of transfer of heat (there’s 3!)
- conduction
- convection
- radiation
Define conduction.
The movement of heat through a medium, without the movement of the medium.
During conduction, heat energy is transferred from the hot end to the cooler end through the _____________ in the medium.
vibration of the particles
During conduction, particles at the heated end _____ energy, vibrate _____ and ___________ with surrounding particles to transfer energy.
gain, faster, collide
Conduction speed (best to worst):
____>____>____
solid > liquid > gas
