2 BTEC National Applied Science resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter BTEC National SubjectClear filter Applied Science Exam board Edexcel TopicClear filter Energy of systems Resources Crossword Flashcards Multi-tool Quizsearch Revision Cards Energy of systems BTEC National, Applied Science 9 flashcards Energy of systems BTEC National, Applied Science 1 revision cards Search again