revision activities

http://www.bbc.co.uk/bitesize/ks3/science/organisms_behaviour_health/food_chains/revision/2/

http://www.bbc.co.uk/bitesize/ks3/science/organisms_behaviour_health/food_chains/revision/2/

http://www.bbc.co.uk/bitesize/ks3/science/organisms_behaviour_health/food_chains/quiz/q39312979/

http://www.docbrown.info/ks3biology/9CmcHP6.htm