Soluble vs Insoluble

Determine if the items on the left are soluble or insoluble.

	soluble	insoluble
metal key
baking soda
tempera paint powder
sugar cubes
Breaks down into tiny pieces when mixed with water
Its appearance most likely changes when mixed with water.
The substance dissolves.
The substance does not dissolve.
Does not break down into smaller pieces when mixed with water
Gravel, rocks, and sand