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Unit 6c:
More about Dissolving
Recognise that solids remain in the solution when they dissolve and can be recovered by evaporation; identify several factors that affect the rate at which a solid dissolves.
See also ‘Solids, liquids and how they can be separated’ and ‘Gases around us’
Direct2U Lesson Plan
In this activity children carry out experiments to investigate aspects of
dissolving and use a spreadsheet to represent the results in a suitable graph.
(A sample Excel spreadsheet is supplied with the activity.)
 forum.ngfl.gov.uk l Also download  Excel Spreadsheet
 Use the Intel Microscope to look at crystallisation in a saturated salt solution.
Observe evaporation of salty water using time-lapse photography .
Observe cornflour and water dry out, using time lapse.
Look at grains of different materials through the microscope e.g. coffee, salt, sugar...
Make a short movie, or time-lapse movie, of a sugar cube dissolving. Export the movie into PowerPoint.
 Children investigate the different times taken for various solids to dissolve in hot and cold water.
 Powerpoint Resource - (Greenwich ICT)
How a brine evaporator works
Watch an online animation showing filtration in industry.
www.industry-animated.org
Science Display Resources
www.schoolslinks.co.uk
Websites
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