write up a conrol group and a experimaental group
Example:
Control:Plant with no fertilizer
Eperimental groups:plant with fertilizer.
The point of the control is to prove that the IV did something to the plant.
Here's another example:
http://skepdic.com/control.html
A control group and an experimental group are both used in scientific experiments to compare the effects of different variables.
The control group serves as a baseline and represents the normal or standard condition. It is treated exactly the same way as the experimental group, except for the variable being studied. The purpose of the control group is to provide a reference point against which the effects of the variable can be evaluated.
On the other hand, the experimental group is the group that receives a specific treatment or is exposed to the variable being studied. This group is used to determine the effects of the variable and compare it to the control group.
For example, let's say you want to investigate the effect of a new medication on patients with a specific disease. You would divide the patients into two groups: the control group and the experimental group. The control group would receive a placebo or an existing standard treatment, while the experimental group would receive the new medication. By comparing the outcomes of both groups, you can determine the effectiveness of the new medication.
In the case of the example you provided, the control group would be a plant that does not receive any fertilizer. This group allows researchers to observe the natural growth and development of the plant without any external factors influencing it. The experimental group would consist of plants that are given the fertilizer being tested. This group enables researchers to assess the effects of the fertilizer on the plant's growth, compared to the control group.
It is important to have a control group in order to have a baseline for comparison and ensure that any observed effects are due to the variable being studied, rather than other factors. The control group helps researchers identify the true impact of the variable under investigation.