Question

Conduction is most effective in liquids and gases.(3 points)

True

False
Convection is most effective in liquids and gases.(3 points)

True

False
Review the examples below. Which would be considered an example of convection. (Select BOTH answers)(4 points)

a glass of water on a counter at room temperature

warming air in a hot air balloon to make it rise

sea breeze moving from the warm beach to the ocean

sunlight warming your face

boiling water on a hot stove

Answer 1

Conduction is most effective in liquids and gases.
False.
- Conduction works best in solids where particles are closely packed and vibrational energy transfers efficiently.

Convection is most effective in liquids and gases.
True.
- Convection is the bulk movement of fluid (liquid or gas) carrying heat with it, so it occurs primarily in fluids.

Examples of convection (select BOTH):
- warming air in a hot air balloon to make it rise
- boiling water on a hot stove

(Hot air rising and the circulating currents in boiling water are convection; sunlight is radiation, a glass of water at room temperature involves little convective motion.)