Look at the following statement. What word completes the gap?Substances move by diffusion from an area where they are __________ concentrated to an area where they are less concentrated.

What is the missing word? __________ substances can move into or out of cells by diffusion.

Diffusion occurs when a substance is at aconcentration in one region, and at a lower concentration in another region. This differencein is called the concentration .

Which important word is missing from the definition of diffusion below?The spreading out of particles of a gas, or any substance in solution, resulting in the movement from an area of higher concentration to an area of lower concentration.netsolidsmovementliquid

This process works because different dye particles dissolve and travel at different __________ . What word completes the gap?

Simple diffusion is the movement of molecules from areas of ______ concentration to areas of ______ concentration.Multiple choice question.lower; lowerhigher; lowerhigher; higherlower; higher