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B1: Quiz 9 – Answers
B1: Quiz 9 – Answers
1) Diffusion is the net movement of particles from an area of high concentration to an area of low concentration
Or, diffusion is the net movement of particles down a concentration gradient
2)
a) From right to left
b) Yes (some of the particles will go from left to right)
3) The 3 main factors are:
4) A higher temperature increases the rate of diffusion. This is because a higher temperature gives the particles more kinetic energy, which means that they move around faster, thus resulting in a greater rate of diffusion
5)
a) Concentration gradient is the difference in concentrations between the area of high concentration and the area of low concentration
b) A greater concentration gradient increases the rate of diffusion. This is because more particles from the high concentration area will be moving to the low concentration area, and fewer particles will be moving in the opposite direction (low to high); this results in the net movement being higher/ a greater rate of diffusion
6) A greater surface area increases the rate of diffusion. This is because a greater surface area means that more particles can pass through a membrane at once
Or, diffusion is the net movement of particles down a concentration gradient
2)
a) From right to left
b) Yes (some of the particles will go from left to right)
3) The 3 main factors are:
- temperature
- concentration gradient
- surface area
4) A higher temperature increases the rate of diffusion. This is because a higher temperature gives the particles more kinetic energy, which means that they move around faster, thus resulting in a greater rate of diffusion
5)
a) Concentration gradient is the difference in concentrations between the area of high concentration and the area of low concentration
b) A greater concentration gradient increases the rate of diffusion. This is because more particles from the high concentration area will be moving to the low concentration area, and fewer particles will be moving in the opposite direction (low to high); this results in the net movement being higher/ a greater rate of diffusion
6) A greater surface area increases the rate of diffusion. This is because a greater surface area means that more particles can pass through a membrane at once
Questions
1) Give a definition of diffusion.
2) The diagram below shows the distribution of particles on two sides of a membrane.
1) Give a definition of diffusion.
2) The diagram below shows the distribution of particles on two sides of a membrane.
a) Will the net movement of particles be from left to right, or from right to left?
b) Will any of the particles move in the opposite direction to the direction that you gave for your answer to part a; yes or no?
3) Without looking at the later questions, what are the three main factors that affect the rate of diffusion?
4) Does a higher temperature increase or decrease the rate of diffusion? Explain your answer.
5)
a) What does concentration gradient refer to?
b) Does a greater concentration gradient increase or decrease the rate of diffusion? Explain your answer.
6) Does a greater surface area increase or decrease the rate of diffusion? Explain your answer.
b) Will any of the particles move in the opposite direction to the direction that you gave for your answer to part a; yes or no?
3) Without looking at the later questions, what are the three main factors that affect the rate of diffusion?
4) Does a higher temperature increase or decrease the rate of diffusion? Explain your answer.
5)
a) What does concentration gradient refer to?
b) Does a greater concentration gradient increase or decrease the rate of diffusion? Explain your answer.
6) Does a greater surface area increase or decrease the rate of diffusion? Explain your answer.