heat transfers Flashcards

1
Q

what are the three main methods of heat transfer?

A

Conduction, convection, and radiation

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2
Q

True or False: Conduction occurs in solids.

A

True

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3
Q

Fill in the blank: Convection is the transfer of heat through ______.

A

fluids (liquids and gases)

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4
Q

what is an example of conduction in cooking?

A

Cooking food in a frying pan on a stove

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5
Q

Multiple choice: Which method of heat transfer does not require a medium? A) Conduction B) Convection C) Radiation

A

C) Radiation

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6
Q

what is the role of a convection current?

A

To circulate heat within a fluid

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7
Q

True or False: Radiation can travel through a vacuum.

A

True

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8
Q

Fill in the blank: The transfer of heat from a hot object to a cooler one through direct contact is called ______.

A

conduction

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9
Q

what happens to the molecules in a substance as it heats up?

A

They move faster and spread apart

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10
Q

Multiple choice: Which method of heat transfer is primarily used in an oven? A) Conduction B) Convection C) Both A and B

A

C) Both A and B

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11
Q

what is the primary method of heat transfer in boiling water?

A

Convection

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12
Q

True or False: Heat always flows from a cooler object to a warmer object.

A

False

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13
Q

Fill in the blank: The process of heat transfer through electromagnetic waves is known as ______.

A

radiation

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14
Q

what is a practical application of radiation in food preparation?

A

Using a microwave to heat food

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15
Q

Multiple choice: Which of the following is a poor conductor of heat? A) Copper B) Wood C) Aluminum

A

B) Wood

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16
Q

what is the effect of a lid on cooking with convection?

A

It traps heat and moisture, improving cooking efficiency

17
Q

True or False: All materials conduct heat equally well.

A

False

18
Q

Fill in the blank: The transfer of heat through the movement of air or liquid is called ______.

A

convection

19
Q

what is the primary heat transfer method used when grilling food?

A

radiation

20
Q

Multiple choice: Which of the following methods is most efficient for cooking food evenly? A) Radiation B) Convection C) Conduction

A

B) Convection