1 CairoGovernorateDepartment:EnglishNozhaDirectorateofEducationForm:6 th PrimaryNozhaLanguageSchoolsRevisionSheet“IsmailiaRoad”BranchSecondTermUnit 8 * New Words : pollution making air , water , earth harmful to people , animals and plants . waste a wrong use of money , substances , time , energy and abilities . a survey an examination of opinions , behaviours made by asking people questions a questionnaire a written list of questions given to a number of people for collecting data . energy the power taken from something such as electricity or heat or the capacity of doing work . wild life animals and plants that grow independently of people refillable (adj.) can be filled again . reuseable (adj.) can be used again . materials (n) a physical substance with things that can be made from . shrubs a plant with many small branches . a passenger someone who is travelling in a vehicle but is not driving it . dripping taps the falling water of taps . - care about be interested in sth . - find out discover . - cut down decrease – make it less . - cut down on make the best use of something . * New structure Shall past should Should = ought to Can past could Necessity “ pr esent”[ has t o / have t o / must / n eed to ] “ Past” [ had to ] Absence of Necessity doesn’t have to / don’t have to /don’t need to - doe sn’t need t o needn’t + inf.