Let’s start by looking at three different water samples:
THINK-PAIR-SHARE
Think about these questions, then discuss with a partner:
- What differences do you see between the three water samples? Describe them.
- What might cause these differences in how the water looks? What could be in the water?
- Which water sample do you think would be the safest to drink, and why?
- How could we measure or describe the ‘cloudiness’ of each sample?