1 A small 3-ounce piece of meat has about 21 grams of protein. A typical 8-ounce piece of meat could have over 50 grams of protein. 2  One 8-ounce container of yogurt has about 11 grams of protein. 3  One cup of milk has 8 grams of protein.  One cup of dry beans has about 16 grams of protein.
All of these aspects of peanut growth can be measured and can be used as dependent variables in an experiment. There are different dependent variables possible in an experiment. The investigator can choose the one he thinks is most important, or he can choose to measure more than one dependent variable.
The independent (or manipulated) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable. For example, a student might change the position of a planeâs wing to see how it affects the average speed of a model plane. The wing position would be the independent variable- because the student purposely changes its location.