REVISION OF SCIENCE I Changes of states boiling condensation evaporation freezing : : : : liquid gas liquid solid → → → → gas liquid gas liquid II Fill in the blank with a suitable word from the box gases tiny container particles gas move solid shape invisible solid around runny level Every material is made up of lots of (1) particles All materials are either solid Liquid or a (2) In a (3) all the particles are packed tightly together and can hardly move A solid stays in its own (4) unless we cut it oe shape it ourselves Anything you can take hold of is a (5) The (6) in a liquid are not so tightly packed They can (7) a little Liquids are (8) and flow downwards They take the shape of the (9) they are in the surface of a liquid stays (10) The particles in (11) have lots of rooms and move around all over the place all the time Gases are all (12) us spreading into any empty space they can Most gases are (12) tiny gas solid shape solid particles move runny container 10 level 11 gases 12 around 13 invisible III Vertebrates (with backbones) & invertebrates (without backborns) Vertebrates invertebrates