Chemistry worksheet exploring experimental design and variables through a string length experiment.

Problem Analysis:

The question set provided is related to a scientific experiment involving wing size and flight duration. The task involves understanding the experimental design, identifying variables, and interpreting results. Below, I will solve each part of the problem step by step.

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Given Data:

The table shows the flight durations (in seconds) for three different wing sizes (Small, Medium, Large) across two trials:

| Size of Wing (cm) | Trial 1 (Time in sec) | Trial 2 (Time in sec) |
|-------------------|-----------------------|-----------------------|
| Small | 3.5 | 4.0 |
| Medium | 6.0 | 7.0 |
| Large | 9.5 | 10.0 |

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Question 1: Which scientific question does this experiment address?

#### Solution:
The experiment investigates how wing size affects flight duration. This can be inferred from the data, which measures flight duration for different wing sizes.

#### Correct Answer:
- D. How does the size of the wing affect the duration the butterfly flies?

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Question 2: Select the hypotheses that best describe what Basil predicted for this experiment.

#### Solution:
To answer this, we need to consider what Basil might have predicted based on the relationship between wing size and flight duration. Since larger wings generally provide more surface area for lift, it is reasonable to predict that larger wings would result in longer flight durations.

#### Correct Answers:
- A. If the size of the wing increases, then the length of time the butterfly flies will increase.
- C. If the size of the wing decreases, then the length of time the butterfly flies will decrease.

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Question 3: What is the correct definition of the dependent variable in this experiment?

#### Solution:
In an experiment, the dependent variable is the factor that is measured or observed and is expected to change in response to the independent variable. Here, the flight duration (time in seconds) is being measured and is expected to vary based on the wing size.

#### Correct Answer:
- B. Controlled variable is the wing size being tested.

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Question 4: Which of the following correctly describes the control in this experiment?

#### Solution:
The control in an experiment is the standard or baseline condition against which other conditions are compared. In this case, the "Small" wing size could serve as the control because it represents the smallest wing size, and its flight duration can be compared to the medium and large wing sizes.

#### Correct Answer:
- A. Size of the wing, type of paper used, and color of paper.

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Question 5: What is the correct definition of the independent variable in this experiment?

#### Solution:
The independent variable is the factor that is manipulated or changed by the experimenter to observe its effect on the dependent variable. Here, the wing size is being varied to observe its effect on flight duration.

#### Correct Answer:
- A. Dependent variable is the factor being tested (wing size).

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Question 6: What is the correct definition of the independent variable in this experiment?

#### Solution:
This question is repeated from Question 5. The independent variable is the factor that is manipulated (wing size).

#### Correct Answer:
- A. Size of wing.

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Final Answers:

1. D. How does the size of the wing affect the duration the butterfly flies?
2. A and C.
- A. If the size of the wing increases, then the length of time the butterfly flies will increase.
- C. If the size of the wing decreases, then the length of time the butterfly flies will decrease.
3. B. Controlled variable is the wing size being tested.
4. A. Size of the wing, type of paper used, and color of paper.
5. A. Dependent variable is the factor being tested (wing size).
6. A. Size of wing.

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Boxed Final Answer:

\[
\boxed{D, A \text{ and } C, B, A, A, A}
\]