heat transfers Flashcards
what are the three main methods of heat transfer?
Conduction, convection, and radiation
True or False: Conduction occurs in solids.
True
Fill in the blank: Convection is the transfer of heat through ______.
fluids (liquids and gases)
what is an example of conduction in cooking?
Cooking food in a frying pan on a stove
Multiple choice: Which method of heat transfer does not require a medium? A) Conduction B) Convection C) Radiation
C) Radiation
what is the role of a convection current?
To circulate heat within a fluid
True or False: Radiation can travel through a vacuum.
True
Fill in the blank: The transfer of heat from a hot object to a cooler one through direct contact is called ______.
conduction
what happens to the molecules in a substance as it heats up?
They move faster and spread apart
Multiple choice: Which method of heat transfer is primarily used in an oven? A) Conduction B) Convection C) Both A and B
C) Both A and B
what is the primary method of heat transfer in boiling water?
Convection
True or False: Heat always flows from a cooler object to a warmer object.
False
Fill in the blank: The process of heat transfer through electromagnetic waves is known as ______.
radiation
what is a practical application of radiation in food preparation?
Using a microwave to heat food
Multiple choice: Which of the following is a poor conductor of heat? A) Copper B) Wood C) Aluminum
B) Wood