Question 1

Which of the following best describes the role of a hypothesis in the scientific method?

Accepted Answer

A hypothesis is a tentative explanation that can be tested through experimentation.

Question 2

In the pill bug experiment testing phototaxis, what is the independent variable?

Accepted Answer

The amount of light present in each region of the chamber.

Question 3

If pill bugs are positively phototaxic, which prediction is most accurate?

Accepted Answer

Pill bugs will move toward the light source.

Question 4

Which of the following is a controlled variable in the pill bug phototaxis experiment?

Accepted Answer

The number of pill bugs used in each trial.

Question 5

In the experiment testing pill bug response to moisture (hydrotaxis), what is the dependent variable?

Accepted Answer

The number of pill bugs found in the moist region after 15 minutes.

Question 6

Which statement best describes negative hydrotaxis?

Accepted Answer

Movement of animals away from moist areas.

Question 7

A student designs an experiment to test pill bug movement in response to temperature. Which of the following is the best hypothesis?

Accepted Answer

If pill bugs are placed in a chamber with a warm and a cool region, then they will move toward the warm region.

Question 8

Which of the following best describes a control group in the pill bug moisture experiment?

Accepted Answer

A group of pill bugs not exposed to any moisture variable.

Question 9

Which graph would best represent the relationship between the independent and dependent variables in the pill bug phototaxis experiment?

Accepted Answer

A bar graph with light conditions on the x-axis and number of pill bugs on the y-axis.

Question 10

Which of the following is an example of taxis in animal behavior?

Accepted Answer

A pill bug moving toward a moist area in response to water.

Question 11

If the results of an experiment do not support the original hypothesis, what is the next step in the scientific method?

Accepted Answer

Reject or revise the hypothesis and design a new experiment.

Question 12

Which of the following best defines ethology?

Accepted Answer

The study of animal behavior.

Question 13

A student observes that pill bugs move toward moist filter paper. What type of taxis is this?

Accepted Answer

Hydrotaxis

Question 14

Which of the following is a prediction for the pill bug hydrotaxis experiment if the hypothesis is 'Pill bugs are positively hydrotaxic'?

Accepted Answer

If pill bugs are positively hydrotaxic, then they will move toward the moist region.

Question 15

Which equation best represents the relationship between the number of pill bugs in a region ($$N$$), total pill bugs ($$T$$), and percentage in that region ($$P$$)?

Accepted Answer

$$P = \frac{N}{T} 	imes 100$$

Question 16

In a pill bug experiment, a student finds that 7 out of 10 pill bugs are in the moist region after 15 minutes. What is the percentage of pill bugs in the moist region?

Accepted Answer

$$70\%$$

Question 17

Which of the following is NOT a step in the scientific method as described in the study materials?

Accepted Answer

Ignoring experimental data

Question 18

A student wants to test the effect of substrate type (sand vs. soil) on pill bug movement. What is the independent variable?

Accepted Answer

The type of substrate (sand or soil)

Question 19

Which of the following best describes a prediction in the scientific method?

Accepted Answer

A prediction is a statement about what you expect to occur if the hypothesis is true.

Question 20

If pill bugs are negatively phototaxic, what would you expect to observe in the behavior chamber?

Accepted Answer

Most pill bugs will be found in the dark region.

Scientific Method and Animal Behavior: Pill Bug Experiments

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