All matter is made of ____ which are constantly ____around. These particles can move from place to place without anything moving them. The particles ____, moving from where there is ____ of them, to where there is ____of them. This movement is known as ____. We can speed up diffusion by increasing the ____ . We can also increase diffusion by having a bigger concentration ____ . Single celled ____ can obtain everything they need (____, oxygen, etc) by diffusion.

Diffusion

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