What is the independent variable? Select one option from the list below.
1 is the correct answer help me please .thanks
Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit).
The experimental hypothesis was
“There will be a large difference between the number of maggots in a dark environment and the number in a brightly illuminated one.”
What is the independent variable? Select one option from the list below.
1) Light intensity
2) The reaction rate of maggots
3) The average number of maggots in each light condition
4) The total number of maggots
5) The number of maggots in each light condition
6) The distance between the darkest and most brightly lit parts of the choice chamber
7) The time of day
The independent variable is the factor in an experiment that is intentionally manipulated or changed by the researcher. It is the variable that is hypothesized to have an effect on the dependent variable.
In this experiment, Sue is testing whether fly maggots select a dark or brightly lit environment. To determine the independent variable, we need to identify the factor that Sue intentionally manipulated.
Looking at the options provided, the independent variable in this experiment is 1) Light intensity. Sue set up a chamber with a gradient in light intensity, ranging from dark to brightly lit. By manipulating the light intensity, Sue is testing how it affects the behavior of the maggots and their preference for either a dark or brightly lit environment.