An experiment is conducted to study how the concentration of dissolved oxygen in an aquari… — ACT

An experiment is conducted to study how the concentration of dissolved oxygen in an aquarium affects the respiration rate of a specific fish species. A researcher predicts that if the dissolved oxygen concentration increases, the respiration rate (measured in gill flares per minute) of the fish will decrease. The table below displays the results:

Dissolved Oxygen ( $mg/L$ )	Respiration Rate (gill flares/min)
$4.0$	$82$
$6.0$	$68$
$8.0$	$54$
$10.0$	$41$

Based on the table, does the experimental data support the researcher's prediction?

A
No, because as the dissolved oxygen concentration increased, the respiration rate decreased.
B
No, because as the dissolved oxygen concentration increased, the respiration rate increased.
Yes, because as the dissolved oxygen concentration increased, the respiration rate decreased.Answer
D
Yes, because as the dissolved oxygen concentration increased, the respiration rate increased.

Answer

Yes, because as the dissolved oxygen concentration increased, the respiration rate decreased.

The correct option states that the data supports the prediction because as the dissolved oxygen concentration increased, the respiration rate decreased. This matches the researcher's prediction that respiration rate would decrease as dissolved oxygen concentration increased.

Step-by-Step Solution

Identify the researcher's prediction.

The researcher predicted that as dissolved oxygen concentration increases, the respiration rate will decrease.

To evaluate the hypothesis, we first need to know what trend is being predicted.

Analyze the trend in the data table.

As the dissolved oxygen concentration increases from

4.0\text{ mg/L}

10.0\text{ mg/L}

, the respiration rate decreases from

82

41\text{ gill flares/min}

To see if the prediction is correct, we must determine the actual relationship shown by the data.

Compare the predicted trend with the actual trend.

The predicted trend (increase in oxygen leads to decrease in respiration) matches the actual trend (as oxygen increases, respiration decreases). Therefore, the data supports the prediction.

This comparison allows us to make the final determination.

Key Concept

Evaluating a hypothesis using experimental data

Estimated Time:45s

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