Charry is researching the impact of the amount of food given to the fish on their body fat. To test this, Charry followed the procedure: One tank of goldfish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank is fed four times a day during a six- week study. The fish's body fat is recorded daily.
Independent Variable: What variable have you manipulated or changed in your experiment?
Dependent Variable: What variable were you observing or measuring to the variable you have manipulated?
Controlled Variables: What variables have you kept constant or unchanged during your experiment or are the same to all groups?
Control Group: Which group was NOT exposed to the independent variable or serves as the comparison?
Experimental Group: Which group was exposed to the independent variable or shows the effect of the variable that is being tested?
Independent Variable: What variable have you manipulated or changed in your experiment?
Dependent Variable: What variable were you observing or measuring to the variable you have manipulated?
Controlled Variables: What variables have you kept constant or unchanged during your experiment or are the same to all groups?
Control Group: Which group was NOT exposed to the independent variable or serves as the comparison?
Experimental Group: Which group was exposed to the independent variable or shows the effect of the variable that is being tested?
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Answer:
In this experiment, Charry is studying the impact of the amount of food given to the fish on their body fat. The following variables can be identified:
Independent Variable: The manipulated variable is the amount of food given to the fish (once a day, twice a day, and four times a day).
Dependent Variable: The measured variable is the body fat of the goldfish in each tank.
Controlled Variables: The variables that are kept constant throughout the experiment are the type of fish (goldfish), the size of the tanks, the water quality, and the lighting conditions. All these factors should be the same across all three groups.
Control Group: The control group is the group of goldfish that is fed the normal amount of food once a day, serving as a reference point to compare the effects of the different feeding frequencies on body fat.
Experimental Group: The experimental groups are the ones that are fed twice a day and four times a day, respectively. These groups will show the effects of increased feeding frequencies on the body fat of the goldfish.
Explanation:
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Answer:
Independent Variable: The amount of food given to the fish (normal amount, twice a day, four times a day).
Dependent Variable: The fish's body fat, which is recorded daily.
Controlled Variables: Factors that are kept constant or unchanged during the experiment include the type of fish (goldfish), the size and age of the fish, the temperature and lighting conditions in the tanks, the water quality, the size of the tanks, and the duration of the study.
Control Group: The group of goldfish that is fed the normal amount of food once a day serves as the control group. They are not exposed to any changes in the feeding schedule.
Experimental Groups: The two experimental groups consist of goldfish that are fed either twice a day or four times a day. These groups are exposed to the manipulated independent variable, which is the increased frequency of feeding. The impact of this variable on the fish's body fat is observed and measured.
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