Question

independent and dependent variables scenarios

1. cockroaches are exposed to a pesticide. after 3 hours, 95% of the insects are dead.

Explanation:

Identify the experimental scenario

The scenario describes cockroaches exposed to a pesticide, resulting in 95% of the insects being dead after 3 hours. This is an experiment testing the effect of a chemical agent on insect mortality.

Determine the independent variable

Using the Independent Variable concept, we identify the factor manipulated or introduced by the researcher. Here, the presence or exposure to the pesticide is the cause being tested.

Determine the dependent variable

Using the Dependent Variable concept, we identify the factor being measured or observed as a response. Here, the outcome measured is the survival or mortality rate of the cockroaches (specifically, the percentage of dead insects).

Formulate the final response

We will clearly state the independent variable (exposure to pesticide) and the dependent variable (the percentage of dead cockroaches / mortality rate) based on the scenario.

Answer:

• Independent Variable: Exposure to the pesticide (or presence of the pesticide)
• Dependent Variable: The percentage of dead cockroaches (or cockroach mortality rate)