Required Practical 3: Effects of Osmosis on Plant Tissue
Cards (21)
- What should you be able to describe by the end of the video?
- What is osmosis?
- What happens to plant cells when placed in water?
- What occurs when a plant cell is placed in a concentrated solution?
- What vegetable is commonly used to investigate osmosis?
- Why do we peel the potato before the experiment?
- How do we ensure all potato cylinders are the same diameter?
- What is the ideal length for potato cylinders?
- Why do we measure the length and mass of each cylinder?
- How much of a 0.5 molar sugar solution is added to the first test tube?
- Why do we use distilled water instead of tap water?
- What should you do after leaving the potato cylinders overnight?
- Why is it important not to press on the cylinders when drying them?
- How do you calculate percentage change?
- What is the formula for percentage change?
- If a potato cylinder has a starting mass of 1.56 grams and increases by 0.25 grams, what is the percentage change?
- If a potato cylinder has a starting mass of 1.32 grams and decreases by 0.19 grams, what is the percentage change?
- What does the graph of percentage changes in mass or length against sugar concentration show?
- What does it mean when the graph crosses the x-axis?
- What does the concentration at the x-axis crossing indicate?
- What should you learn for the exam regarding this practical?