Objective
Independent:- Surface area:Volume ratio Dependent:- Rate of diffusion Questions:
1. What predictions did you make about the rate of diffusion and the effect of surface area to volume ration? I predicted that as the surface area to volume ratio increased so would the rate of diffusion as less time would be taken for the solution to diffuse through the agar cube. 2. Identify at least three key features you controlled in this experiment. The temperature, concentration of acid and volume of acid were three of the controlled variables that we kept constant for our experiment. 3. What additional procedures could you carry out to make these results more reliable and accurate? Repeating the experiment and taking averages would help increase the reliability. To increase the accuracy of the experiment a machine could have been used to more accurately cut the cubes reducing the human error in cutting them and increasing accuracy. 4. Explain the effect of surface area to volume ration on the rate of diffusion and how this is important in living organisms. Surface area to volume ratio is important in small organisms as it allows them to diffuse gases directly into their respiring cells. For organisms that do not have a respiratory system they use diffusion to get gases to their cells. This is because they have a large surface area and a small volume inside for the gases to reach. So the reduced diffusion distance and low metabolic activity means that they can get enough gases to the cells using diffusion.
0 Comments
Leave a Reply. |
Jack BojanArdingly College Archives
March 2017
|