Heat Transfer Flashcards
(24 cards)
What is conduction?
Conduction is the transfer of heat through direct contact between the objects.
What is convection?
Convection is the transfer of heat through the movement of fluids (liquids or gases). The particles move faster, and they spread out
What is radiation?
Radiation is the transfer of heat in the form of electromagnetic waves
True or False: Conduction requires a medium to transfer heat.
True
Fill in the blank: In convection, heat is transferred by the movement of _____ or _____.
fluids; gases
Which method of heat transfer does not require a medium?
Radiation
What is the primary mechanism of heat transfer in solids?
Conduction
True or False: In convection, hot fluid rises while cold fluid sinks.
True
What is the term for the ability of a material to conduct heat?
Thermal conductivity
Multiple choice: Which of the following is an example of conduction? A) Boiling water B) Touching a hot stove C) Sunlight warming the Earth
B) Touching a hot stove
Fill in the blank: The process of heat transfer from the sun to the Earth is primarily through _____ .
radiation
What happens to the density of a fluid as it heats up?
It decreases.
Which heat transfer method is most significant in cooking on a stovetop?
Conduction
True or False: All materials conduct heat equally well.
False
What is the main driver of convection currents in the atmosphere?
Temperature differences
In terms of heat transfer, what does the term ‘insulator’ refer to?
A material that resists the flow of heat.
Multiple choice: Which of the following is NOT a mode of heat transfer? A) Conduction B) Convection C) Compression D) Radiation
C) Compression
Fill in the blank: The transfer of heat through direct contact between materials is called _____ .
conduction
What is an example of convection in everyday life?
Boiling water.
True or False: Radiation can occur in a vacuum.
True
What type of heat transfer occurs when warm air rises and cool air sinks?
Convection
Which method of heat transfer is responsible for the warmth felt from a fire?
Radiation
Fill in the blank: The efficiency of heat transfer by conduction depends on the material’s _____ .
thermal conductivity
Multiple choice: Which of the following would be a poor conductor of heat? A) Copper B) Wood C) Aluminum D) Gold
B) Wood
