Watch this video about the stresses on the body caused by carrying heavy backpacks. Then design an investigation about the effect of carrying backpacks on students’ health using these steps of the scientific method: make observations or inferences ask questions construct hypotheses and make predictions test hypotheses analyze results Your investigation can address any question you have about backpacks and student’s health that you choose. https://app. edmentum. com/content-delivery/resource/52e02 a7c-8b86-442c-a08b-ce0a818b335f