Notebook entries contain evidence that students can use their observational data to make claims that air takes up space and has weight and is, therefore, matter.
Use these criteria to guide your interpretation of student work:
Annotated drawing of syringes
Annotated drawing of inflated balloon
Next steps might be a discussion of experiences from everyday life that provide similar evidence that air takes up space and has weight. For example, putting air in a tire pushes the tire out as the air fills the space and increases the weight.