Thermal Conductors vs. Insulators

Conductors and Insulators

Controlling Heat Transfer

Review of Heat Transfer

• When objects have different temperatures, heat is transferred from hot to cold objects, until the temperatures are the same.

• Scientists classify the forms of heat transfer to make predictions about how temperatures will change.

• Conduction - heat transfer through solid objects

• Convection - heat transfer through liquids and gases

• Radiation - heat transfer through waves

Reorder

Sequence what happens when heat is transferred.

• The objects have different temperatures.

• Heat is transferred from the hot object to the cold object.

• The objects have the same temperatures.

1

2

3

• 1
• 2
• 3

Multiple Choice

To make it easier to study Heat Transfer, scientists classify the methods into

3 categories

Those categories are:

• Producers

  Consumers

  Decomposers

• Stop

  Drop

  Roll

• Helpful

  Harmful

  Neutral

• Conduction

  Convection

  Radiation

Labelling

Place the correct types of heat transfer where they are happening.

Drag labels to their correct position on the image

Convection

Conduction

Radiation

Match

Match the heat transfer method to its description.

• Conduction

• Convection

• Radiation

Solid Objects

Liquid and Gas

Waves

• Solid Objects

• Liquid and Gas

• Waves

Match

Match the heat transfer method to its description.

Conduction

Convection

Radiation

• Conduction

• Convection

• Radiation

Multiple Choice

When scientists have classified all of the heat transfer in a system, they can ___.

• Predict how temperatures will change

• Take a break

• Control how temperatures will change

Controlling Heat Transfer

• Classifying forms of heat transfer lets scientists predict how temperatures will change.

• To then control the transfer of heat, scientists can make changes to the environment to increase or decrease the speed of heat transfer.

• One change is the decision about what material objects are made of.

• Some materials transfer heat quickly and some transfer heat slowly.

Multiple Choice

To control the transfer of heat, scientists can ___.

• Make changes to the environment

• Tell the heat to slow down

• Freeze time so heat cannot transfer

Multiple Choice

One change scientists can use to slow down heat transfer is ___.

• Change the material objects are made of

• Change how heat is classified

• Use a different thermometer

Drag and Drop

In this graph, the ​

Placeholder

line shows the fastest heat transfer and the ​

Placeholder

line shows the slowest heat transfer.

Drag these tiles and drop them in the correct blank above

green

blue

red

purple

Drag and Drop

In this diagram, the ​

Placeholder

transferred heat the fastest and the ​

Placeholder

transferred heat the slowest.

Drag these tiles and drop them in the correct blank above

metal

wood

stone

fiberglass

Conductors

• Remember that conduction is the transfer of heat through solids that are touching.

• Solids that speed up the transfer of heat are called "Conductors."

• Metals are heat conductors because their particles are very closely packed, so they are always touching.

• Diamonds, graphite, and glass are also good heat conductors because their particles are closely packed.

Multiple Choice

Solids that speed up the transfer of heat are called ___.

• Conductors

• Insultators

Multiple Choice

Conductors make heat transfer ___.

• Faster

• Slower

Multiple Select

Which materials are good conductors?

(Pick 3!)

• Metal

• Diamond

• Graphite

• Wood

• Cloth

Multiple Choice

In conductors, particles are ___, so the heat can easily transfer from one particle to the next.

• tightly-packed

• loosely-packed

Multiple Choice

Which solid would be the best conductor?

Open Ended

"I think Box __ would be a better conductor because ___."

Insulators

• Materials that slow down the transfer of heat are called "Insulators."

• Since air particles are not closely packed, transferring heat through air is very slow.

• Any materials that trap air can help to slow down heat transfer.

• Solids that are not closely packed will also help to slow heat transfer.

• Solid insulators include rubber, wood, cloth, plastic, and foam.

Multiple Choice

Solids that slow down the transfer of heat are called ___.

• Conductors

• Insultators

Multiple Choice

Insulators make heat transfer ___.

• Faster

• Slower

Multiple Select

Which materials are good insulators?

(Pick 3!)

• Metal

• Diamond

• Wood

• Cloth

• Plastic

Multiple Choice

In insulators, particles are ___, so the heat canNOT easily transfer from one particle to the next.

• tightly-packed

• loosely-packed

Multiple Choice

Which solid would be the best insulator?

Multiple Choice

Another way to make a good insulator is to trap ___, which is very loosely packed.

• Air

• Chickens

• Time

Open Ended

"The ____ line shows the best insulator because ___."

Controlling Heat Transfer

• Heat transfer is also affected by the thickness of the materials.

• Thicker layers of insulation slow down heat transfer more than thinner layers.

• To slow the transfer of heat, add more layers of thick insulation.

Drag and Drop

In this graph, the ​

Placeholder

line shows the fastest heat transfer and the ​

Placeholder

line shows the slowest heat transfer.

Drag these tiles and drop them in the correct blank above

green

red

Drag and Drop

In this diagram, the ​

Placeholder

wall transferred heat faster and the ​​

Placeholder

wall transferred heat slower.

Drag these tiles and drop them in the correct blank above

thin

fiberglass

thick

Multiple Choice

Thicker insulation will make heat transfer ___.

• Faster

• Slower

Categorize

Options (12)

Conductors

Insulators

Thin Materials

Thick Materials

Metal

Wood

Diamond

Plastic

Graphite

Cloth

Tightly-packed

Loosely-packed

Classify these objects into their speed of transfer.

Faster Heat Transfer

Slower Heat Transfer

Open Ended

"To protect my hands, I would stir the hot water with the ___ spoon because ___."