To determine which experiment's data should be changed to "No" in the "Chemical reaction?" column, let's carefully examine the experiments listed.
1. Experiment 1 shows:
- Sources: "Theal"
- Evidence reaction: "Gintomiton"
- Chemical reaction? Yes
2. Experiment 2 shows:
- Sources: "Vregratbing sed?"
- Evidence reaction: "Gasternation"
- Chemical reaction? Yes
3. Experiment 3 shows:
- Sources: "Cooboperiuce 中 Wrenjuce"
- Evidence reaction: "Coorchnge"
- Chemical reaction? Yes
4. Experiment 4 shows:
- Sources: "ingdA + kqud"
- Evidence reaction: "Precpeate tomuten"
- Chemical reaction? Yes
We know that Janet's results correctly identified 3 experiments with a chemical reaction and 1 without, since the correct number of experiments showing "Yes" should be 3. Thus, we need to identify which one of the listed experiments should actually be recorded as "No."
From analyzing the table:
- Experiment 1: Seems legitimate based on typical reaction indicators.
- Experiment 2: Also seems plausible.
- Experiment 3: Similarly legitimate based on described reactions.
- Experiment 4: Could be the one to review given the equipment ambiguity.
Given this, Experiment 3 should have its data updated to "No" in the "Chemical reaction?" column.
Therefore, the experiment whose "Chemical reaction?" data should be changed to "No" is Experiment 3.
