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put the steps of the light reactions in the correct order

- light energy is transferred to a chlorophyll reaction center where electrons become energized.

- a protein in the electron transport chain, pumps h+ ions from the stroma into the thylakoid space

- electrons from the electron transport chain close to photosystem ii replace the elctrons lost in photosystem i

- electrons from photosystem i become energized and escape photosystem i and move down the second electron transport chain.

- h+ ions flow down the concentration gradient through a channel in atp synthase, releasing energy in the process

- electrons move down the electron transport chain, releasing energy

- electrons move to an electron acceptor in the electron transport chain and electrons in photosystem ii are replaced by the splitting of a water molecule

- photosystem ii receives photons in the form of light energy

- water is split to replace the electrons in photosystem ii

- at the end of the electron transport chain, the energized electrons and an h+ ion are used to reduce nadp+ to nadph

- atp uses energy to add a phosphate to adp forming atp