The requirements and products of photosynthesis: practical
I can predict and investigate the presence of starch in the leaves of living plants kept in different conditions, and can explain my predictions and observations.
The requirements and products of photosynthesis: practical
I can predict and investigate the presence of starch in the leaves of living plants kept in different conditions, and can explain my predictions and observations.
Lesson details
Key learning 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.
- 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.
Common misconception
Mixing up a prediction, an observation and an explanation.
This practical lesson explores predictions, observations and explanations in the context of using iodine solution to test leaves for starch.
Keywords
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
Equipment
Geranium, kettle, large beakers, heat-proof mats, boiling tubes, glass rods, forceps, ethanol, Petri dishes, white tiles, iodine solution, droppers, foil, bell jars, soda lime, marble chips, acid.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
Loading...
Starter quiz
6 Questions
Exit quiz
6 Questions
