Question

a student notices that food coloring spreads out faster in warm water than in cold water. which of the following conclusions explains this observation? particles in cold water are not moving. particles in warm water are undergoing a chemical reaction. particles in warm water move faster than in cold water. particles in warm water are larger than particles in cold water.

Explanation:

The kinetic - molecular theory states that the particles of a substance move faster at higher temperatures. In warm water, the water molecules have more kinetic energy, which causes the food - coloring particles to diffuse (spread out) more quickly. The other options are incorrect: particles in cold water are moving (just more slowly), there is no chemical reaction occurring here, and the size of the particles is not the main factor in this observation.

Answer:

Particles in warm water move faster than in cold water.