Suggested answers light +


carbon dioxide


Assessment guidelines


• This activity is intended for informal assessment. • Write the above equation on the board and ask learners to show their work to the class. Check that their answers are correct.


Remediation/Remedial activity


Summarise the process of photosynthesis on the board so that learners understand the basic process.


Practical activity 2 Show that green leaves produce starch


Learner’s Book page 15 Guidelines to implement this activity


• This is a pair activity. • Sort learners into pairs and ask them to read through the method of the experiment. • Warn learners of the dangers of heating water and do not heat alcohol directly. • Ask learners to write up their findings in a report form as described in the activity.


Background knowledge


• Ethanol and methylated spirits have a lower boiling point than water, so, it is best to heat them in a beaker in a water bath. Chlorophyll obscures the iodine stain in a leaf and therefore has to be extracted from the leaf prior to staining it.


Suggested answers • This activity is intended for formal assessment.


29


chlorophyll + sunlight


glucose + oxygen


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