Toclassify materials into solids / liquids
Provide a selectionof solid material in lump form and ask pupils how they could sortthem into two groups. e.g. appearance, texture, transparency,magnetic properties. Encourage them to use the word property.Change the selection of materials a number of times to encouragepupils to look for new groupings.
Introduce someliquids to the selection prompt pupils to classify materials intosolids and liquids. Which materials are solids, whichmaterials are liquids?
Make sure thecollection of materials includes some solids in lump form and someliquids, coloured and colourless. What are the differencesbetween solids & liquids?
Draw out ideas thatsolids have a fixed shape whereas liquids take up the shape of thecontainer they are in. (This can be emphasized by water in twodifferent shaped bottles)
Introduce somecrystals (sand, salt) and powders (flour) Are these solidsor liquids?
The crystals andpowders are obviously solids but they flow like liquids and, if thecontainer is shaken up they take the shape of the container. Showhow powder & crystals can be formed to make a lump (sugarlump)
Fill in gaps.Worksheet 1, 3, 6, 7
Wide range ofmaterials including:-
Wood,metal glass plastic, paper, card
Sand,salt, sugar (granular & lump), talc, flour
Water,lemonade, cola, washing-up liquid, tea coffee
Tomatosauce as a viscous liquid
Glasses or vases ofdifferent shapes