Conductors & Insulators

What is the primary driving force behind heat transfer?

• Humidity levels

• Temperature difference

• Velocity difference

• Pressure difference

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why can't heat transfer occur without a temperature difference?

• Because temperature difference does not affect heat transfer

• Because heat only moves from a lower to a higher temperature

• Because heat cannot move at all without a temperature difference

• Because heat always moves from a higher to a lower temperature

Why is copper not a good material for building walls in hot climates?

• It is not durable.

• It is too expensive.

• It has low thermal conductivity.

• It has high thermal conductivity.

Tags

NGSS.MS-ETS1-2

Which material would have a higher thermal resistance?

• Brick

• Copper

• Aluminum

• Steel

What does thermal resistance depend on?

• The cost of the material

• The thickness and thermal conductivity of the material

• The color of the material

• The temperature outside

Tags

NGSS.MS-PS3-3

What is natural convection?

• Heat transfer through electromagnetic waves

• Movement of fluid due to external forces like fans

• Heat transfer through direct contact

• Movement of fluid due to temperature differences

Tags

NGSS.MS-ESS2-6

What is forced convection?

• Movement of fluid due to natural temperature variations

• Heat transfer through direct contact

• Movement of fluid due to external forces like fans or wind

• Heat transfer through electromagnetic waves

Tags

NGSS.MS-PS3-3

What happens in the boundary layer during convection?

• Air moves faster, increasing heat transfer

• Air stops moving, increasing conduction

• Air moves slowly, reducing convection

• Air temperature equalizes, stopping heat transfer

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

How does double-paned windows reduce heat transfer?

• By trapping air that reduces movement and convection

• By using reflective coatings

• By absorbing more heat

• By increasing thermal conductivity

Tags

NGSS.MS-PS3-3

What is the role of reflective coatings in minimizing heat transfer?

• They reduce the movement of air

• They reflect electromagnetic waves, reducing radiation

• They absorb more electromagnetic waves

• They increase conduction

Tags

NGSS.MS-PS3-3