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Question 1:

Which of the following is an example of an independent variable?

A) The height of plants.
B) The number of flowers produced.
C) The amount of fertilizer applied.
D) The temperature of the environment.

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Explanation: The correct answer is C) The amount of fertilizer applied. The independent variable is the variable that is manipulated or controlled by the researcher. In this case, the amount of fertilizer applied is the independent variable, as it is deliberately changed to observe its effect on the dependent variable, which is the height of plants.

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Question 2:

Which of the following is an example of a dependent variable?

A) The volume of a liquid.
B) The color of a solution.
C) The time taken to complete a task.
D) The concentration of a substance.

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Explanation: The correct answer is C) The time taken to complete a task. The dependent variable is the variable that is observed or measured in response to changes in the independent variable. In this case, the time taken to complete a task is the dependent variable, as it is influenced by the independent variable(s) and provides information on the effect of the independent variable(s).

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Question 3:

Which of the following is an example of an independent variable?

A) The weight of an object.
B) The distance traveled.
C) The pH level of a solution.
D) The age of participants.

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Explanation: The correct answer is C) The pH level of a solution. The independent variable is the variable that is manipulated or controlled by the researcher. In this case, the pH level of a solution is the independent variable, as it is intentionally changed to examine its impact on the dependent variable(s).

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Question 4:

Which of the following is an example of a dependent variable?

A) The size of a reaction vessel.
B) The concentration of a solute.
C) The pressure of a gas.
D) The number of repetitions performed.

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Explanation: The correct answer is B) The concentration of a solute. The dependent variable is the variable that is observed or measured in response to changes in the independent variable. In this case, the concentration of a solute is the dependent variable, as it is influenced by the independent variable(s) and provides information on the effect of the independent variable(s).

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Question 5:

Which of the following is an example of an independent variable?

A) The age of a participant.
B) The color of a solution.
C) The temperature of an oven.
D) The humidity of the environment.

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Explanation: The correct answer is C) The temperature of an oven. The independent variable is the variable that is manipulated or controlled by the researcher. In this case, the temperature of an oven is the independent variable, as it is intentionally adjusted to examine its influence on the dependent variable(s).