Heat energy is lost from a house by one of three processes.
Which process involves hot air rising and heat energy escaping through any air gaps?

1.   ?    Conduction
2.   ?    Radiation
3.   ?    Convection

Heat energy is lost from a house by one of three processes.
Which process involves hot objects giving out invisble heat rays?

1.   ?    Conduction
2.   ?    Radiation
3.   ?    Convection

Heat energy is lost from a house by one of three processes.
Which process involves heat energy passing through solid objects?

1.   ?    Convection
2.   ?    Conduction
3.   ?    Radiation

Most insulating materials work by

1.   ?    Stopping heat flow along a solid
2.   ?    Reflecting heat rays back towards the hot object
3.   ?    Trapping a static layer of air.