Sound waves are rapid changes in the attractions between molecules. The picture below shows a portion of a graduated cylinder partly filled with liquid. Water is composed of atoms, which are composed of molecules. Water is composed of protons and electrons, which are composed of atoms. Water is composed of molecules, which are composed of atoms.
Water is composed of protons and electrons, which are composed of molecules.
In a lab experiment, John and Denisha poured 5 grams of a gray powder into some water. They stirred the water and poured it through a paper filter into a container. Gray powder was left on the filter. The container's water was clear. When it dried, they weighed the gray powder.