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Photosynthesis

Photosynthesis is the process that converts light energy into chemical energy (in the form of glucose).

Light energy (usually from the sun) is used drive chemical reactions in photosynthesis. The overall chemical equation for photosynthesis is: $$$\ce{6CO2 + 6H2O ->[\text{light}] C6H12O6 + 6O2}$$$

$$$\text{Carbon dioxide + Water $\xrightarrow{\text{light}}$ Glucose + Oxygen}$$$

Photosynthesis occurs in specialised organelles called chloroplasts.

A palisade cell in the leaf can contain over 100 chloroplasts!

Sugars produced by photosynthesis can be stored in the leaf as starch. Alternatively, they can be transported to the rest of the plant through vascular bundles (veins).

The energy plants get from glucose can be used to build new cells or transport substances around the plant.

Leaves trap the light energy needed for photosynthesis.
Leaves trap the light energy needed for photosynthesis.