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Materials:
-Espom salt
-Food colouring
-beaker, small cup, or a container
-Freezer
Procedure:
stir 1/2 cups of very hot tap water add some food coloring and espom salt then refrigerate for a few hours
$26
3
54
Manipulated variable: We manipulate the temperature of the water.
Controlled: how many materials we add.
Ttle
Controlled:
the amount of materials we add.
Crystals