Joshua fills one large container with cold water Then he fills a small container with hot water and red food coloring, and seals it with a lid. Next, he puts the small container into the large container and removes the lid of the small container. He observes the red colored water from the small container rising up to the top of the cold water.

Question

Joshua fills one large container with cold water Then he fills a small container with hot water and red food coloring, and seals it with a lid. Next, he puts the small container into the large container and removes the lid of the small container. He observes the red colored water from the small container rising up to the top of the cold water.
Which two statements explain why this happens?
A. because the hot water has the same density as the cold water
B. because the hot water molecules move faster than those of cold water
C. because the hot water molecules move as fast as those of cold water
D. because the hot water is more dense than the cold water
E. because the hot water is less dense than the cold water

GPT-4o mini · Answer

The correct statements that explain why the red colored water from the small container rises to the top of the cold water are:

B. because the hot water molecules move faster than those of cold water E. because the hot water is less dense than the cold water

The hot water molecules move more rapidly due to their higher energy, which contributes to the hot water being less dense than the cold water. As a result, the less dense hot water rises to the top.