Photosynthesis Lesson Objectives: Thursday, July 05, 2018 Photosynthesis Lesson Objectives: Describe how substances needed for photosynthesis enter and leave leaves Explain how leaves are adapted for photosynthesis Starter Can you remember the word and symbol equation for photosynthesis?

Task On your table – on the scrap paper – spider diagram Photosynthesis Write down ANY words you would associate with photosynthesis

Plant cells

Photosynthesis

Equations

Products of photosyntheis Glucose Soluble so can be transported around the plant dissolved in water Can be made into insoluble starch which can be stored inside cells and used later Can be converted into cellulose used in call walls Can be converted to proteins Can be made into fats and oils

Structure of a leaf

Autumn leaves

Autumn leaves Chlorophyll is green During winter plants absorb the chlorophyll from the leaves so they can drop the leaves but not loose the chlorophyll. Because the chlorophyll has been absorbed the leaves change colour

Adaptations of leaves to photosynthesis Large surface area to absorb light Thin so gasses don’t have far to diffuse Containing chlorophyll Network of veins to transport water and sugars Having stomata to allow gasses to diffuse in and out

Activities 1. How does water get into leaves 2. Adapted leaves (1o minutes at each activity then class discussion)

To finish off... You should now be able to.... Describe how substances needed for photosynthesis enter and leave leaves Explain how leaves are adapted for photosynthesis

Final question Gardeners like plants with variegated leaves. How might these plants be at a disadvantage to other garden plants?