Question

in an experiment testing sunlight’s effect on plant growth, which is the dependent variable? amount of sunlight height of the plant type of soil pot size why is it important to have a control group? your answer a student tests whether fertilizer increases tomato production. what is

Explanation:

1. In an experiment testing sunlight's effect on plant growth, the dependent variable is what is being measured and is affected by the independent variable. Here, the height of the plant is what we expect to change based on the amount of sunlight, so it is the dependent variable. The amount of sunlight is the independent variable, and type of soil and pot size are controlled variables.
2. A control group is important in an experiment because it provides a baseline for comparison. It is a group that does not receive the experimental treatment. By comparing the experimental group (the group that receives the treatment) to the control group, we can determine if the treatment (e.g., sunlight, fertilizer) actually has an effect. Without a control group, it would be impossible to know if any observed changes are due to the treatment or other factors.

Answer:

1. B. Height of the plant
2. A control group provides a baseline for comparison to determine if the experimental treatment has an effect.