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TGLA2: Language Alerts LINKS Language Alert Text Related page of main content Related page of Teachers’ Guide LA3 Sometimes people talk about 'solid particles' or ‘gas particles’, as though there are three types of particle, but this is incorrect: • There are no ‘runny’ liquid particles or ‘hard’ solid particles. • The particles of a substance do not have different properties when the substance is in different states. Particles of a substance in the gas state are just more energetic than particles of the same substance in the liquid state. D2.2 TGD2 LA4 • Some books contain phrases like ‘a solution of a solid in water’, where ‘solid’ refers to the state of a pure sample of the substance before it is added to the water. • The dissolved substance can not still be ‘a solid’. We can only talk about ‘state’ when we when the particles of a substance are together with each other. Individual particles do not have a state. I4.1 TGI2 main content d2.2 teachers' guide d2 main content i4.1 teachers' guide i2 more info tgla1: notes tgla2: notes tgla3: notes tgla4: notes tgla5: notes more info   < prev | next >

a Science Enhancement Programme CD-ROM 2005   user guide