Probiotics contain species of these bacteria but do they actually work to increase their population in our intestines?
This activity is suitable for extending the more able students. They plan an investigation to collect evidence before evaluating how valid their data would be.
Oxford Sparks is a portal for engaging with a wealth of exciting science taking place across Oxford University. Get more great resources from the Oxford Sparks here and on its website at oxfordsparks.ox.ac.uk. You can also follow on Twitter at @OxfordSparks.
Sign up here for your free Brilliant Teacher Box Set
Get 8 KS3/4 maths lessons with expert teaching techniques