St Paul's Catholic Primary School
A Voluntary Academy
Aspire not to have more but to be more – St Oscar Romero
Science
Using flour and weights to test the effect of gravity on depth and width of craters.
In science this week we investigated the reversible and irreversible changes which occur when we mix water, sugar, lemon juice and baking soda. The sugar dissolved, which is a reversible change; the lemon juice mixed and the baking soda created a new material which formed bubbles of carbon dioxide. This is an irreversible change.
In science we had to complete a ‘separating materials’ workshop to try to separate a range of materials from each other. We managed to remove paperclips from water using magnets and separated sand, marbles and glitter using different sized sieves, colanders and filter papers, but realised that the sugar and salt will require a different method.
In science today, we had to find out which materials were soluble. We had to use the words solvent, solute, solution, mixture, soluble, insoluble and dissolve.
