About This Lesson
I use short activities like this on days i'm givig a quiz. Since i have students of all levels I allow students who finish quickly to work on activities like this so that they do not disturb students still testing. I would normally use this to introduce an upcoming unit. Key: It goes 'We breathe in oxygen and breathe out the carbon dioxide that was made during respiration
A really good starter activity if used following a lesson on Respiration. Uses Problem solving skills too.