Independent vs Dependent Variables in Biology

The video tutorial explains the concepts of independent and dependent variables in controlled experiments. It defines the independent variable as the one being tested or manipulated, while the dependent variable is the one being observed or measured. The tutorial provides examples to illustrate these concepts, such as study time affecting test grades, aspirin affecting headache relief, and light bulb brands affecting longevity. The video concludes with a review of these terms, emphasizing their roles in forming hypotheses.

What is a controlled experiment?

• An experiment that does not involve any measurements.

• An experiment where all variables are changed simultaneously.

• An experiment where all conditions are kept constant except for the variable being tested.

• An experiment without any variables.

What is another name for the independent variable?

• Responding variable

• Manipulated variable

• Measured variable

• Constant variable

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NGSS.MS-PS3-4

What does the independent variable represent in an experiment?

• The variable that is kept constant

• The variable that is observed and measured

• The variable that is changed or manipulated

• The variable that is not used

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NGSS.MS-PS2-2

NGSS.MS-PS3-4

What is another name for the dependent variable?

• Responding variable

• Constant variable

• Independent variable

• Manipulated variable

Tags

NGSS.MS-LS2-1

What does the dependent variable represent in an experiment?

• The variable that is changed or manipulated

• The variable that is kept constant

• The variable that is not used

• The variable that is observed and measured

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

In the example of students studying, what is the independent variable?

• Test grades

• Study time

• Number of students

• Subjects studied

Tags

NGSS.MS-PS2-2

In the example of students studying, what is the dependent variable?

• Number of students

• Test grades

• Study time

• Subjects studied

In the example of taking aspirin for headaches, what is the independent variable?

• Severity of headache

• Whether or not aspirin is taken

• Type of headache

• Duration of headache

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NGSS.MS-LS1-5

In the example of taking aspirin for headaches, what is the dependent variable?

• Severity of headache

• Whether or not aspirin is taken

• Duration of headache

• Type of headache

What part of the hypothesis does the independent variable represent?

• The then part

• The cause

• The effect

• The result

Tags

NGSS.MS-PS2-2