Grade 5 Heat Transfer – PEP Performance Task

Strand: Energy – Heat | Focus: Conduction, Convection, Radiation

Replace with real heat-transfer image.

Scenario – “Keeping the Lunch Warm”

Container	Material	Starting Temp	Temp After 30 mins	Notes
A	Metal cup	80°C	48°C	Very hot outside
B	Plastic cup	80°C	60°C	Warm outside
C	Insulated flask	80°C	72°C	Cool outside

Container A Container B Container C

Metal is a poor conductor Metal conducts heat quickly Flask has a vacuum Radiation cannot pass metal

A B C

Poor conductor Good conductor Reflects heat Stops radiation

Plastic is a good conductor Plastic is a poor conductor No convection Radiation only happens in space

Conduction Convection Radiation Insulation

Heat escapes → cools faster Temp stays same Gets hotter Freezes

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