1) what does vigorous mean? a) quickly b) fizzy c) heat d) transparent liquid containing a solid or gas we can't see 2) what colour does calcium make when put on a flame a) lilac b) blue c) orange d) red 3) what does this sign mean? a) caution b) toxic c) Toxic to the environment d) corrosive 4) what does diffusion mean? a) The random movement of a substance from low to a high concentration b) The random movement of a substance from a high to low concentration 5) Independent variable (shark attack)  a) time b) tempature 6) what is this a) thermometer b) dropper c) measuring cylinder d) metal rod 7) Controlled variable a) Volume of water b) Time 8) what is distillation a) evaporation followed by condensation b) condensation followed by evaporation 9) condensation a) Gas turns to liquid b) liquid turns to gas 10) pure a) a single substance b) mixed together with two or more substances

Science topic 1

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