Question

think about the lab procedure you just read. label each factor below v if it was variable during the procedure or c if it was constant. molecule size (large starch molecules vs. small glucose molecules) material used as the membrane amount of substances used number of trials whether the molecules diffused through the

Explanation:

1. Molecule size:

• # Explanation:

Step1: Molecule size is an inherent property for a particular substance. In this case, starch and glucose have fixed - sized molecules.

This is a characteristic of the substances themselves and doesn't change during the experiment just because of the experimental process. So it is constant.

• # Answer: C

1. Material used as the membrane:

• # Explanation:

Step1: Once a particular material is chosen as the membrane for the experiment, it remains the same throughout the experiment unless changed intentionally.

It is a fixed component of the experimental setup and not something that varies during normal experimental procedures without external intervention to change it. So it is constant.

• # Answer: C

1. Amount of substances used:

• # Explanation:

Step1: The amount of substances can be adjusted during different trials or parts of the experiment.

For example, more or less of a substance can be added or used in different experimental runs to observe different effects. So it is variable.

• # Answer: V

1. Number of trials:

• # Explanation:

Step1: The number of trials can be increased or decreased depending on the requirements of the experiment.

The experimenter can decide to run the experiment more or fewer times, so it is a variable factor.

• # Answer: V

1. Whether the molecules diffused through the membrane:

• # Explanation:

Step1: This outcome depends on many factors like the properties of the membrane, the concentration gradient, etc.

It is not a fixed outcome and can vary from one trial to another, so it is a variable factor.

• # Answer: V

Answer:

1. Molecule size:

• # Explanation:

Step1: Molecule size is an inherent property for a particular substance. In this case, starch and glucose have fixed - sized molecules.

This is a characteristic of the substances themselves and doesn't change during the experiment just because of the experimental process. So it is constant.

• # Answer: C

1. Material used as the membrane:

• # Explanation:

Step1: Once a particular material is chosen as the membrane for the experiment, it remains the same throughout the experiment unless changed intentionally.

It is a fixed component of the experimental setup and not something that varies during normal experimental procedures without external intervention to change it. So it is constant.

• # Answer: C

1. Amount of substances used:

• # Explanation:

Step1: The amount of substances can be adjusted during different trials or parts of the experiment.

For example, more or less of a substance can be added or used in different experimental runs to observe different effects. So it is variable.

• # Answer: V

1. Number of trials:

• # Explanation:

Step1: The number of trials can be increased or decreased depending on the requirements of the experiment.

The experimenter can decide to run the experiment more or fewer times, so it is a variable factor.

• # Answer: V

1. Whether the molecules diffused through the membrane:

• # Explanation:

Step1: This outcome depends on many factors like the properties of the membrane, the concentration gradient, etc.

It is not a fixed outcome and can vary from one trial to another, so it is a variable factor.

• # Answer: V