ESRT pg 14 - T-Birds Earth Science - Home

ESRT pg 14

Topic: Transfer of Energy

3rd

Energy travels…

High Energy Low Energy

Energy will stop transferring when…

Energy Becomes Equal

Heat Energy Measures how fast molecules are moving

Faster particles = higher temps

Slower particles = lower temps

All matter radiates energy, except at absolute zero.

Absolute zero = Temperature where all molecules stop

moving

Temperature and Energy: How

Cold is Cold?

Deep outer space =

3°K

Coldest temperature in a laboratory =

0.000,000,001

A few billionths of a degree above absolute zero

Now that’s cold!

Methods of Energy Transfer

1) Radiation

2) Conduction

3) Convection

Radiation Transfer of energy in empty

space, solid, liquid and gas

Ex: Sun’s energy reaching the Earth

Conduction

Vibrating molecules hit each other transferring energy

*Best in solids – molecules closer together.

Conduction

Convection Transfer of energy by different densities

*Best in gases & liquids

Name that Heat Transfer Method

Convection

Radiation

Radiation

Convection

Conduction

Final Question: • What are the three methods of heat

transfer in the following picture?

1

2

3