Chapter #5 Energy: Matter in Motion

At what temperature does molecular motion cease?

• Absolute zero.

• 273 F.

• 273 C.

• All of the above.

Microwaves cause molecules to vibrate rapidly, which then transmit energy to neighboring molecules. Microwaves have the greatest effect on _______.

• fats

• proteins

• sugars

• water

Higher temperatures increase the rate of reactions because ______.

• both conduction and convention are used

• less energy is absorbed

• molecules collide with greater force

• surface area increases

When heat energy is added, _____.

• molecules speed up

• temperature rises

• it is measured in calories

• All of the above.

Which form of energy is most often analyzed when developing food processing equipment?

• Chemical.

• Electrical.

• Mechanical.

• Radiant.

The energy required to create a phase change without changing the temperature is called ______.

• calories.

• joules.

• latent heat.

• specific heat.

Energy is usually transported in which form?

• Chemical.

• Electrical.

• Mechanical.

• Nuclear.

Microwaves cook food with what type of energy ?

• Chemical.

• Electrical.

• Nuclear.

• Radiant.

When heat transferred by convention, it is because ____.

• energy is passed from molecule to molecule

• latent heat has been released

• of the motion of fluids or gases

• All of the above.

Which is an example of heat being transferred mainly through conduction?

• A baseboard furnace heating a room.

• Bacon cooking on a skillet.

• Water boiling in a kettle.

• All of the above.