Question of the Day Label the heat movement as

conduction, convection or radiation.

1.Lava Lamp 2.Fire 3.Spoon in soup

Thermal Energy on the MoveThermal Energy on the Move

Thermal energy travels as heat Thermal energy travels as heat from higher temperature to low from higher temperature to low temperature.temperature.

3 Ways Thermal Energy can 3 Ways Thermal Energy can movemove

1.1. ConductionConduction

2.2. ConvectionConvection

3.3. RadiationRadiation

1.1. Conduction-Conduction- the transfer of the transfer of energy through matter by energy through matter by direct contact of particles.direct contact of particles.

Ex: Spoon in a pot of boiling Ex: Spoon in a pot of boiling water. The heat from the water. The heat from the stove heats the pot which stove heats the pot which heats the water which heats heats the water which heats the spoon.the spoon.

2. Convection-2. Convection- the transfer of the transfer of energy by the bulk movement energy by the bulk movement of matter.of matter.

-This happens when fluid -This happens when fluid particles move from 1 location particles move from 1 location to another, carrying energy with to another, carrying energy with them.them.

Ex: hot-air balloon Ex: hot-air balloon

Hot water rises

Cooler water sinks

Cools at the surface

Radiation-Radiation- the transfer of the transfer of energy in the form of waves.energy in the form of waves.

-Does not require matter.-Does not require matter.

Ex: Sun-rays Ex: Sun-rays

-Only radiant energy that is -Only radiant energy that is absorbed changes to thermal absorbed changes to thermal energy (heat).energy (heat).

There are no particles between the Sun and the Earth.

? RADIATION

Promoting Thermal EnergyPromoting Thermal Energy

Conductors-Conductors- allow heat to allow heat to move easily through them.move easily through them.

Ex: MetalsEx: Metals

Solids Solids

Reducing Thermal EnergyReducing Thermal Energy

Insulators-Insulators- do not allow heat do not allow heat to move easily through them.to move easily through them.

Ex: WoodEx: Wood

PlasticPlastic

GlassGlass

GasGas

Label the heat movement as conduction, convection or radiation.

1.Lava Lamp 2.Fire 3.Spoon in soup

Radiation Conduction Convection