All matter is made of ____ which are constantly ____. These particles can move from place to place without anything moving them. Particles will move until they have completely ____ and filled the space. They move from where there is ____ to where there is ____. The proper way to describe this is that they move from an area of ____ concentration to an area of ____ concentration. This movement is known as ____. Single celled ____ can obtain everything they need by diffusion, such as ____ and oxygen. They can also get rid of waste products such as ____

Diffusion

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