Question
A student fills a large container with cold water. He fills another, smaller container with hot water and red food coloring, and seals it with a lid. Next, he places the small container of hot water into the larger container of cold water. When he removes the lid on the small container, he observes the colored water rising up to the top of the cold water. Why does this occur? Select all that apply.
Responses
because the hot water is less dense than the cold water
because the hot water is less dense than the cold water
because the hot water molecules move slower than those of cold water
because the hot water molecules move slower than those of cold water
because the hot water has the same density as the cold water
because the hot water has the same density as the cold water
because the hot water is more dense than the cold water
because the hot water is more dense than the cold water
because the hot water molecules move faster than those of cold water
because the hot water molecules move faster than those of cold water
because the hot water molecules move as fast as those of cold water
Responses
because the hot water is less dense than the cold water
because the hot water is less dense than the cold water
because the hot water molecules move slower than those of cold water
because the hot water molecules move slower than those of cold water
because the hot water has the same density as the cold water
because the hot water has the same density as the cold water
because the hot water is more dense than the cold water
because the hot water is more dense than the cold water
because the hot water molecules move faster than those of cold water
because the hot water molecules move faster than those of cold water
because the hot water molecules move as fast as those of cold water
Answers
GPT-4o mini
The correct response for why the colored water rises up to the top of the cold water is:
- **because the hot water is less dense than the cold water**
- **because the hot water molecules move faster than those of cold water**
Hot water is less dense than cold water due to the increased kinetic energy of the water molecules at higher temperatures, causing them to spread apart more, resulting in lower density. When the lid is removed, the hot water (along with the food coloring) rises to the top of the cold water because it floats due to its lower density and the faster movement of its molecules.
- **because the hot water is less dense than the cold water**
- **because the hot water molecules move faster than those of cold water**
Hot water is less dense than cold water due to the increased kinetic energy of the water molecules at higher temperatures, causing them to spread apart more, resulting in lower density. When the lid is removed, the hot water (along with the food coloring) rises to the top of the cold water because it floats due to its lower density and the faster movement of its molecules.