- Citric acid
Things we couldn't see but we could smell:
- We found moisture on the lid
- Why could we only see some of the stuff we put in, and not everything?
- If we can't see something, where did it go?
- Did the stuff we can't see evaporate? Dissolve? Mix with the sand?
We'll be planning our next steps with this dirty water...
How does this relate back to our driving question? What happens to our water when we make it dirty? How do we actually get clean water?