Read the observation, question, and hypothesis.Observation: Hotter water seems to produce more bubbles than cold water when it is mixed with dish soap.Question: Does water temperature affect the amount of bubbles that are produced from dish soap?Hypothesis: Hot water produces more bubbles than cold water when it is mixed with dish soap.D’Angela will mix soap and water in a clean beaker four times. To test her hypothesis, which conditions should change or remain the same each time?
Answer
A
The water temperature should remain the same, but the type of soap should change.
B
The type of soap should remain the same, but the quantity of soap should change.
C
The water temperature should remain the same, but the quantity of soap should change.
D
The type of soap should remain the same, but the temperature of the water should change.
Explanation
To test whether water temperature affects bubble production, D’Angela should change the water temperature while keeping other conditions consistent. The type of soap should remain the same so any difference in bubbles can be linked to temperature rather than a different soap. Therefore, the correct choice is “The type of soap should remain the same, but the temperature of the water should change.”
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