Question

Particle Model Quick Check
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Question
Which statement is always true about diffusion? (1 point)
Responses

During diffusion, particles move from an area of high concentration to an area of low concentration.
During diffusion, particles move from an area of high concentration to an area of low concentration.

During diffusion, particles move from one area in the room to other areas of the room.
During diffusion, particles move from one area in the room to other areas of the room.

During diffusion, particles leave the space that they occupy and go to a different space.
During diffusion, particles leave the space that they occupy and go to a different space.

During diffusion, particles start out colorless and eventually change to a different color.
During diffusion, particles start out colorless and eventually change to a different color.
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Answer 1

The statement that is always true about diffusion is:

**During diffusion, particles move from an area of high concentration to an area of low concentration.**

This is a fundamental principle of diffusion, where substances tend to spread out and move from regions where they are more concentrated to regions where they are less concentrated until equilibrium is reached. The other statements are not universally true. For example, particles do not need to leave the space they occupy or change color during diffusion.