GCSE Osmosis

By what process does the water move in to or out of the potato cells?

• Active transport

• Osmosis

• Diffusion

• Transpiration

Which of these has the highest water concentration?

• 0.1M sugar

• 0.2M sugar

• 0.3M sugar

• 0.4M sugar

Why would a potato gain mass?

• Water leaves the potato because the concentration of water is higher outside

• Water enters the potato because the concentration of water is lower outside

• Water leaves the potato because the concentration of water is lower outside

• Water enters the potato because the concentration of water is higher outside

Why would a potato lose mass?

• Water leaves the potato because the concentration of water is higher outside

• Water enters the potato because the concentration of water is lower outside

• Water leaves the potato because the concentration of water is lower outside

• Water enters the potato because the concentration of water is higher outside

Why do we dab the potatos with a dry paper towel when taking them out of the solution? Choose the best answer.

• To remove mass

• To remove excess mass

• To remove excess water

• To dry them

What is the independent variable of this required practical?

• Concentration of the solution

• Percentage change in mass

• Volume of the solution

• Time the potato is left in the solution

What is the dependent variable of this required practical?

• Concentration of the solution

• Percentage change in mass

• Volume of the solution

• Time the potato is left in the solution

What are the control variables of this required practical?

• Concentration of the solution

• Percentage change in mass

• Volume of the solution

• Time the potato is left in the solution

Why do we calculate percentage change instead of just change in mass?

• It is quicker

• It is more accurate

• It takes into account differences in starting mass

How do we describe the cell membrane that the water molecules travel through?

• Permeable

• Non-permeable

• Partially permeable