Edexcel IGCSE Biology 2.19 Photosynthesis

Practise writing and completing the photosynthesis equation, including correct formulae, balancing and distinguishing symbol from word equations.

Exam points

complete the balanced symbol equation with CO2, H2O, C6H12O6 and O2 in the correct places
distinguish a correct but unbalanced equation from a word equation when marks require symbols

[Maximum number: 2]

The diagram shows a single-celled organism called Chlorella that lives in fresh water. Chlorella has a chloroplast and can photosynthesise.

Complete the balanced chemical symbol equation for photosynthesis.
…… +…… ⟶ …… $+6 \mathrm{O}_{2}$

- one mark for $6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}$ (on

LHS)

Accept $6 \mathrm{H}_{2} \mathrm{O}$ $+6 \mathrm{CO}_{2}$

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