Diffusion is the ____ movement of ____ from an area of high ____ to an area of ____ concentration. We describe this as moving ____ the concentration ____. This ____ often happens across semi-permeable cell ____. Many ____ move this way into and out of the cells of living ____. For example ____ moves by diffusion out of the ____ and into your blood. Carbon ____ moves by diffusion out of the air and into ____. Sugar moves by ____ out of your gut and into your ____ stream. The rate of ____ can be increased or ____ by many factors. A bigger ____ gradient will ____ up the rate of diffusion making it faster. A larger ____ area will also ____ the rate of diffusion. A ____ temperature will decrease the rate of diffusion, ____ it down.

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