Question

base your answers to the questions 5 - 9 on the information and your knowledge of biology. an investigation was carried out using the two setups shown in the diagram. other than the difference shown in the diagram, all other conditions were identical. 5. identify the independent variable in this experiment. wrong answer: red light the independent variable is what is changed or manipulated during the experiment. what is wrong with this answer? what is a more correct answer?

Explanation:

The red - light is constant in both setups, so it cannot be the independent variable. The independent variable is the factor that is changed between the two setups. Here, the temperature is different in setup 1 ($20^{\circ}C$) and setup 2 ($15^{\circ}C$).

Answer:

What is wrong with this answer?: The red - light is not changed between the two setups, so it cannot be the independent variable.
What is a more correct answer?: The independent variable is temperature.