1) In what state of matter does diffusion happen the fastest? a) Solids b) Liquids c) Gases 2) In which direction does diffusion take place? a) Low to high concentration b) High to low concentration c) High to high concentration 3) What is the process where particles spread out from a high concentration to a low concentration? a) Dissolving b) Diffusion c) Osmosis 4) What is one factor that will increase the rate of diffusion? a) Higher temperatures b) Lower temperatures c) Shallow concentration gradient 5) What is the difference in concentration called? a) Concentration gradient b) Concentration effect c) Concentration differential 6) True or false: oxygen diffuses into cells. a) True b) Flase 7) True or false: carbon dioxide diffuses into cells. a) True b) False 8) Where in the body can diffusion take place? a) Large intestine and alveoli b) Alveoli and stomach c) Alveoli and small intestine 9) How does the alveolus affect the rate of diffusion? a) It increases the rate due to higher temperature b) It increases the rate due to higher surface area c) It decreases the rate due to higher surface area 10) Why do fish have thin gills? a) To increase the diffusion path length b) To decrease the temperature of the fish c) To decrease the diffusion path length

Diffusion

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