Year 10 - Science
The requirements and products of photosynthesis: practical
Photosynthesis: requirements and products
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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 explores photosynthesis as the basis for food and biomass, examines cell structure and adaptations in eukaryotic and prokaryotic cells, and covers the photosynthesis process. It focuses on using models and theories to develop hypotheses, interpret data, and present reasoned explanations.
Lesson Summary
You will learn to predict and investigate the presence of starch in the leaves of living plants kept in different conditions, and can explain your predictions and observations.
Key Notes
- Some of the glucose made by photosynthesis is converted into starch and stored in starch grains in leaf cells.
- Iodine solution can be used to test plant leaf tissue for the presence of starch.
- A scientific prediction is a testable statement about a possible outcome, which can be tested in an experiment.
- Predicting the iodine test result for destarched leaves kept in various conditions, and explaining the predictions.
- Observing the iodine test result for destarched leaves kept in various conditions, and explaining the observations.
Vocabulary To Learn
- photosynthesis: the process used by producers to make their own food via a series of chemical reactions
- glucose: a type of sugar, which is a simple carbohydrate
- starch: a complex carbohydrate, made of many glucose molecules joined together to form a polymer
- iodine solution: a reagent that can be used to test for the presence of starch
- prediction: a scientific prediction is a testable statement about a possible outcome, which could be tested in an experiment
Common Mistakes To Avoid
- Mixing up a prediction, an observation and an explanation.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Some of the glucose made by photosynthesis is converted into starch and stored in starch grains in leaf cells. Iodine solution can be used to test plant leaf tissue for the presence of starch.
2. Define this scientific word and use it in context. 'photosynthesis'
the process used by producers to make their own food via a series of chemical reactions. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Mixing up a prediction, an observation and an explanation. Correction: This practical lesson explores predictions, observations and explanations in the context of using iodine solution to test leaves for starch.
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