glassware used to heat liquids filter paper used to filter water paper towels used to soak up water powdered chemicals cleaned from a spill
I gave my students this multiple choice question: Which item can safely be reused after an investigation?

Only one answer is correct among these 4 choices:
- glassware used to heat liquids
- filter paper used to filter water
- paper towels used to soak up water
- powdered chemicals cleaned from a spill

Could you tell me which one is correct?

glassware used to heat liquids