Unit 5D: Changing state Section 3: Evaporation of other liquids
Objectives
Children should learn:
that liquids other than water evaporate
Activities
Outcomes
Children:
Demonstrate using eg nail varnish, correction fluid, that other liquids evaporate. Ask children to explain why they can smell eg perfume, aftershave, natural gas from a distance.
describe some contexts in which other liquids evaporate
explain that they smell things when they evaporate and gases reach their noses
Points to note
At this stage, the distinction between boiling and evaporation can be drawn in terms of the large bubbles seen when the water is boiling and the 'steam' seen as hot water evaporates without boiling.
SAFETY - Solvents such as surgical spirit and nail varnish remover are highly flammable and must NOT be allowed near naked flames. Because of the dangers of solvent abuse, their use must be closely supervised. Any LEA/school guidelines must be followed.
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SAFETY - Solvents such as surgical spirit and nail varnish remover are highly flammable and must NOT be allowed near naked flames. Because of the dangers of solvent abuse, their use must be closely supervised. Any LEA/school guidelines must be followed.