→ Biology - Osmosis Potato Practical → Оқуды бастаңыз / MP3 флэш-карталарын жүктеу

сұрақ		жауап
What was the aim of the osmosis potato practical? оқуды бастаңыз		To investigate the effect of different concentrations of sugar / salt solutions on the mass of potato tissue.
Why is a cork borer used? оқуды бастаңыз		To cut potato cylinders of the same size.
Why must the potato cores be the same size? оқуды бастаңыз		To make the test fair and results reliable.
Why is paper towel used in the experiment? оқуды бастаңыз		To remove excess liquid before measuring mass.
What is the control in this experiment? оқуды бастаңыз		Potato core placed in distilled water.
What happens to the potato cells in distilled water? оқуды бастаңыз		They gain mass because water enters the cells by osmosis.
What happens to potato cells in concentrated sucrose solution? оқуды бастаңыз		They lose mass because the water leaves the cells by osmosis.
What equipment is used to measure potato mass? оқуды бастаңыз		A top-pan balance accurate to at least 0.01g.
How do you calculate percentage change in mass? оқуды бастаңыз		Percentage change=final mass - initial mass / initial mass x 100
Why must onion skin be thin? оқуды бастаңыз		So light can pass through it and individual cells can be seen

Biology - Osmosis Potato Practical