The two statements that explain why the red colored water from the small container rises to the top of the cold water are:
- because the hot water is less dense than the cold water
- because the hot water molecules move faster than those of cold water
These explanations relate to the principles of density and molecular motion. Hot water, being less dense, tends to rise above the colder, denser water. Additionally, the faster-moving molecules in hot water contribute to this behavior, as they spread out more than in cold water.