Question

read each question and circle the correct answer. then, color the picture using the colors and to each correct answer.
question: choice a choice b choice c
the following are factors that can be changed within an experiment: measurements yellow variables red materials green
a variable is purposely changed in an experiment: independent variable sky blue dependent variable purple controlled variable orange
which variable must be kept the same throughout an experiment so that the results are valid? independent variable black dependent variable yellow controlled variable blue
what variable is what is being measured in an experiment? independent variable yellow dependent variable orange controlled variable black
a student conducts an experiment to test the flavor of ice - cream affects how fast the ice - cream melts. identify the dependent variable: ice cream melting time yellow flavor of ice cream red amount of ice cream purple
identify the independent variable from the above experiment: ice cream melting time blue flavor of ice cream purple amount of ice cream green
identify the controlled variable from the above experiment: ice cream melting time yellow flavor of ice cream blue amount of ice cream black
a scientist tests an experiment to see if the color of a poison dart frog is related to its toxicity. identify the independent variable: color of frog green average toxicity score red # of frogs tested within each group orange
identify the dependent variable from the above experiment: color of frog red average toxicity score orange # of frogs tested within each group blue
identify the controlled variable from the above experiment: color of frog sky blue average toxicity score red # of frogs tested within each group yellow
is the following statement true? the independent variable is graphed on the y - axis. yellow the dependent variable is graphed on the x - axis. orange the independent variable is graphed on the x - axis. black
is the following statement true or false? changing more than one variable at a time produces reliable results. green it is important to change only one variable at a time. purple changing more than one variable at a time can cause errors. red

Explanation:

1. Factors that can be changed in an experiment are variables.
2. The variable that is purposely changed is the independent variable.
3. The variable that must be kept the same throughout an experiment to ensure valid results is the controlled variable.
4. The variable that is being measured in an experiment is the dependent variable.
5. In an experiment on ice - cream melting, the independent variable is the flavor of ice - cream as it is what is being changed, and the dependent variable is the ice - cream melting time as it is what is being measured. The amount of ice - cream can be a controlled variable.
6. In an experiment on poison dart frogs, the independent variable is the color of the frog as it is the factor being manipulated, the dependent variable is the average toxicity score as it is the measured outcome, and the number of frogs tested within each group can be a controlled variable.
7. The independent variable is graphed on the x - axis and the dependent variable on the y - axis.
8. Changing only one variable at a time is important to get reliable results as changing more than one can cause errors.

Answer:

1. B. variables [red]
2. A. independent variable [sky blue]
3. C. controlled variable [blue]
4. B. dependent variable [orange]
5. B. flavor of ice cream [red]; A. ice cream melting time [yellow]
6. A. color of frog [red]; B. average toxicity score [orange]
7. C. The independent variable is graphed on the x - axis. [black]
8. B. It is important to change only one variable at a time. [purple]