daily goal: we will be able to compare and contrast convection and conduction. homework: gist...

• Daily Goal: We will be able to compare and contrast convection and conduction.

• Homework: Gist

Science Starter:1. Explain how Kongming Lanterns work.

2. Do you think that all heat is transferred through air particles? Explain your answer.

November 15 Q2 - pg. 13

Conduction***WRITE THIS DOWN***• Conduction is the transfer of

energy from one molecule to another.

• This transfer occurs when molecules hit against each other

• Conduction takes place in solids, liquids, and gases

Let’s learn the sign for conduction!

Conduction isheat energytransferred throughdirect contactExamples:

Pan on stove

Conduction**WRITE THIS DOWN**

Conduction• The fast particles (the hot ones) will transfer

some of their kinetic energy to the slow particles (the cold ones). This will make the slow particles move faster (and therefore have more heat).

• This happens most often in solids, because in solids the particles are packed closely together.

Examples of Convection

• What are some examples conduction that you can you think of?

• Make a list of examples in your notebook. Write down at least 4.

• We will make a list of your ideas. Add to the list in your notebook if someone mentions an example that you don’t have.

In your notebook, create a chart that looks like this:

Conduction Convection

In your notebook, categorize each of the following examples as either conduction or convection:

• The heat you feel from a fireplace

Frying a pancake

A Warm Breeze

Ice Melting in Your Hand

Your hands being heated by hand warmers

A radiator heating a room

Touching a hot handle of a pan

In your table groups, you will:• Create a poster-sized Venn diagram comparing

and contrasting convection and conduction.

• Each of you will have a team role.

• Your poster must include:– At least 3 comparisons in each section (9 total)– At least 3 examples of convection and 3 examples

of conduction– Illustrations of each example

Radiation

• Heat travels from the sun by a process called radiation.

• Radiation is the transfer of heat by waves.

• In addition to the sun, light bulbs, irons, and toasters radiate heat.

• When we feel heat around these items, however, we are feeling convection heat (warmed air molecules)

Radiation

• Radiation is the transfer of energy by electromagnetic waves.

• What is super fun about radiation is that it does NOT require any matter. (It can happen in empty space!)

Examples of Radiation

• The best (and most common) examples of radiation are from the sun and from heat lamps.

• Draw one of those on your foldable. Make sure to label the direction of heat transfer (from hot to cold).

Heat transfer

• Can we have 3 methods of heat transfer at once? YES!

Definition:Transfer of heat through

space in the form of electromagnetic waves

Example:Beachgoer gets sunburned

Radiation

• The heat you feel from a fireplace

• This type of heat transfer causes techtonic plates to move

• boiling water• Heat you feel from a hot

stove• Frying a pancake• fast particles colliding with

slower particles

• air travels this way• transfer through solids• transfer through space• moves as a wave• moves as a current• sun rays reaching earth• occurs with fluids• a coil on an electric stove• this type of transfer is

affected by color

Conduction,Convection, or Radiation?