We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
However, I will give you a start.
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.
A dependent variable is the response or measure of results.
Extraneous variables — other than the independent variable — potentially can affect the dependent variable, so they must be controlled. If possible, you try to keep them constant between the experimental and control group.
The experimental group receives the independent variable.
The control group is similar to experimental, except it does not receive the independent variable. Extraneous variables are balanced between experimental and control groups.
(How would I go about doing this?)
Design an experiment that tests the effect of different concentrations of carbon dioxide on the rate of photosynthesis.
1. A specific question easily measurable and clearly stated
2. A hypothesis that is clearly stated and contains measurable, manipulated and responding variables
3. A list of materials needed
4. A numbered, experimental procedure that clearly describes in detail the sequence of steps to be performed.
5. Identification of independent variables
6. Identification of dependent variables
7. Presentation of results in appropriate form (data table, graph, etc.)
8. Data analysis and concluding statement
1 answer
1 answer