That is the effect of the isolated unity 'stone' when he is placed in a 'water' environment. The stone remains stone, and no essential changes in the structure of the stone occurs. This effect is called 'isolation effect ' since the isolation remains the most essential part in the process. Our scientist counts how much stones we throw, and later he counts how much stones lay on the lake-bottom. He is happy.
Scientists love stones.
That is an 'interaction effect'. The characteristics of each stone influence energetically in a specific way the water, more specific the water-surface is disturbed and water is moved during the descend of the stone corresponding with its size and form. When we throw many stones at the same moment the surface becomes turbulent. When we throw thousands of stones the water surface behaves like a storm. At that level the water movements can even provoke damage to the lakeside or provoke the small fishing boats to capsize.