Year 11 - Science
Effect of osmosis and sugar concentration on the mass of plant tissue: practical
Coordination and control: maintaining a constant internal environment
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers the importance of maintaining a constant internal environment, focusing on body temperature control, osmotic balance, and kidney function. It explains the roles of the skin, kidneys, and ADH, and emphasises data extraction, experiment techniques, and accurate data interpretation.
Lesson Summary
You will learn to carry out an investigation into the effect of sugar solution concentration on the mass of fresh potato tissue.
Key Notes
- Water diffuses into and out of cells by osmosis; net movement is from a more dilute solution to a more concentrated one.
- Investigating the effect of sucrose solution concentration on the mass of potato chips.
- Use of appropriate apparatus to measure volumes, masses and times accurately.
- Safe use of materials and apparatus.
- Control of variables that might affect the results (e.g. temperature).
Vocabulary To Learn
- osmosis: the net movement of water molecules through a selectively-permeable membrane from a dilute solution to a concentrated one
- net movement: the overall movement of particles
- mass: a measure of how much matter something contains, in grams
- control: a variable which is kept constant between all experiments
Common Mistakes To Avoid
- Coordinating the measurements and the sugar solution in this practical is fiddly and if not done methodically, the results can be easily confused.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Water diffuses into and out of cells by osmosis; net movement is from a more dilute solution to a more concentrated one. Investigating the effect of sucrose solution concentration on the mass of potato chips.
2. Define this scientific word and use it in context. 'osmosis'
the net movement of water molecules through a selectively-permeable membrane from a dilute solution to a concentrated one. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Coordinating the measurements and the sugar solution in this practical is fiddly and if not done methodically, the results can be easily confused. Correction: The table in which results will be recorded is clearly labelled and used, and a copy is provided in the worksheet.
More Lessons In This Unit
- Controlling water balance: the kidneys, and nephron structure Study Guide
- Controlling water balance: the kidneys, and treating kidney failure Study Guide
- Controlling water balance: the kidneys, nephron structure and kidney failure Study Guide
- Effect of osmosis and sugar concentration on the mass of plant tissue: analysis Study Guide
- The importance of maintaining constant conditions in the body Study Guide
- The importance of maintaining constant conditions in the body, including osmosis Study Guide
- The role of the nervous system in thermoregulation Study Guide
- The role of the skin in thermoregulation Study Guide
- The roles of the nervous and endocrine systems in controlling water balance Study Guide
- Using a microscope to observe effects of osmosis in plant cells: practical Study Guide
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