Question

In a scientific experiment, what is the role of the independent variable? (1 point)
It is the variable that is manipulated or changed by the researcher to observe its effect on the dependent
• It is the variable that cannot be controlled or measured during the experiment.
• It is the variable that is kept constant throughout the experiment.
In a controlled scientific experiment investigating the effect of light intensity on plant growth, which of the following best describes the dependent variable? (1 point)
• The height of the plants measured at the end of the experiment.
• The type of soil used for all plants in the experiment.
• The light intensity each plant is exposed to during the experiment.
• The amount of water given to each plant daily.

Answer 1

1. In a scientific experiment, the role of the independent variable is: **It is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.**

2. In a controlled scientific experiment investigating the effect of light intensity on plant growth, the dependent variable is best described as: **The height of the plants measured at the end of the experiment.**