Tests of Various Kinds of Conservation
1. Number: test if a child understands that the number of items remains the same even when their arrangement changes
2. Length: test if a child understands that the length of an object stays the same even if its position changes
3. Liquid: test if a child understands that the amount of liquid remains the same even when it is poured into a different shaped container
4. Matter (mass): test if a child understands that the mass of an object remains the same even if its shape changes
5. Weight: test if a child understands that the weight of an object stays the same even if its shape or position changes