This is an elementary science video for kids that help them understand and distinguish soluble and insoluble materials.
SOLUBLE AND INSOLUBLE MATERIALS:
To check the solubility of substances take three glasses of water a spoon and some salt, sugar and sand. Add a spoon of salt to the first glass and stir it the salt completely. Notice that the salt completely dissolves in the water. Similarly, add a spoon of sugar to the second glass. Observe that sugar also dissolves in the water. Finally add the sand sample to the glass of water the sand will not dissolve in the water and just settles at the bottom of the glass. Materials like salt and sugar will dissolve in the water and are called soluble as they dissolve completely in the water, where as substances that do not dissolve in water like sand are called insoluble materials.
FLOATING AND SINKING OBJECTS:
They are some objects which float in water and some that sink. Take three glasses of water in separate beakers. Take oil, peddles and dry leaves. Add all these three materials to the three glasses respectively. Observe that oil floats on water and forms a separate layer. The pebbles sink in water and settle at the bottom of the glass. The dry leaves float on water as they are very light. This demonstration helps us understand and differentiate floating and sinking objects.
