Transcript Heat - science

18 July 2015
Conduction
Objectives
Be able to describe how heat is transferred
You will be able to define conduction and describe it in terms of the
particles inside materials.
HSW: AF3: Select appropriate methods for presenting scientific data.
Used before in:
Will use again in: Lesson 2 –
Energy Transformations
PLTS: Independent enquirers: support conclusions, using reasoned arguments and evidence.
Used before in:
Will use again in:
Keywords
Solid, liquid, gas, particles, conduction, convection, thermal, heat
transfer, insulator.
Outcomes
All students should be able to:
• Define conduction and describe what is
happening in terms of particles
Most students should be able to:
• Describe an experiment that demonstrates
conduction and give examples of good
conductors and insulators.
Some students should be able to:
• Explain how free electrons affect conduction.
Transfer of heat
• Conduction is the transfer of energy
between particles
• Convection is the change of density of a
fluid causing it to flow
• Radiation is the transfer of energy by
waves – infra-red needs no medium to
transfer energy. (The sun’s heat gets here
through space!)
Conduction
• 1) What makes a good conductor?
• 2) What makes a good insulator?
Conduction
• Draw this diagram.
• 1)What happens to the particles in this metal rod as it gets warmer?
• 2) Show how the heat is transferred from one end of the rod to the
other on the diagram.
• 3) What happens to the free electrons?
• 4) Do the particles travel down the rod?
Summary of Conduction
Fill in the gaps using the following words and then stick the summary into your books
(YOU MAY HAVE TO USE WORDS MORE THAN ONCE)
THERMAL
GOOD
ELECTRONS
TRANSFERRED
HEAT
CONDUCTING
VIBRATIONS