Renewable Energy - A source of energy that will not run out, Non-renewable energy - A source of energy that will run out, The Law of conservation of energy - Energy can't be created or destroyed only changed into different forms., Conduction - How heat energy travels through a solid, Convection - Hot liquid or gas rises and cold liquid or gas falls., Radiation - How heat energy travels through a vacuum like space, Wasted energy - Type(s) of energy produced by an appliance that are not needed, Useful energy - Energy produced by an appliance to do a specific job, Cavity wall insulation - A method of reducing heat loss from homes, The variable in an investigation that you change - Independent variable,

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