Bitesize Daily: 9-11 Year OldsScience 9-10 Year-OldsChanging MaterialsBBC Bitesize Duration: 20 minutesFirst broadcast: Tue 23rd Nov 2021, 09:00 on CBBC ChannelLatest broadcast: Tue 7th May 2024, 11:00 on CBBC HDAvailable for 4 monthsWatch nowLearn about comparing and grouping materials, reversible and irreversible changes, and choosing and using materials.ContributorsPresenter:Ben ShiresMr Brown:Kit BrownDirector:Paul NewtonExecutive Producer:Dan GoodingGenresLearningPrimaryBrandBitesize Daily: 9-11 Year OldsSeriesBitesize Daily: 9-11 Year Olds: Science 9-10 Year-Olds Source: BBC Online