Dip a piece of clay in a glass of water. Did the bubbles appear in the water? Where did they come from? What is it?

If you put a piece of clay in a glass of water, then bubbles will appear in the water. No matter how dense the structure of any rock, there will always be gaps between its particles. And since there is no emptiness in nature, they are filled with air. When clay gets into water, water has a higher specific gravity than air, air particles begin to be displaced by water and air bubbles appear in the glass.