Answer:
Explanation:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.
The answer is "Groundwater"
<span>No, it does not mean that the interpretation or design of the first experiment was wrong. What it could mean is that using unboiled water or the lack of paraffin was not the catalyst that caused the carbon dioxide to be produced.</span>
