Why Lesson Planet?
How do sugar and salt affect celery's mass, width, and flexibility? Using simple household ingredients, young scientists will perform a controlled experiment to find out. The lab is scaffolded through a worksheet, but there are no other instructions; you may wish to delete one or both of the graph pages (the format isn't the best) and replace it with a procedure-writing page. There are several dependent variables in the investigation, so within groups, partners could research different variables.