TF7.1 Archimedes Principle
A rock is suspended from a spring balance. When placed in water, its weight change. However, the weight of the water displaced plus the weight of the rock in the water will be the same as that of the rock.
TF7.2 Water Rises to the Same Height
Tubes of different shapes are connected at the bottom. Using dyed water, the class sees that the water rises to the same level, regardless of the shape.