The video tutorial explains experimental investigations, focusing on their definition, the role of variables, and the importance of fair tests and control groups. It covers how to graph variables, distinguishing between independent and dependent variables, and emphasizes maintaining constants to ensure valid results. The tutorial aims to provide a comprehensive understanding of conducting scientific experiments effectively.

What is the primary focus of an experimental investigation?

• To collect random data

• To answer a scientific question

• To prove a theory

• To conduct surveys

What does a 'fair test' in an experimental investigation ensure?

• Only the independent variable is changed

• The hypothesis is always proven

• All constants are ignored

• All variables are changed

Which variable is intentionally changed by the scientist?

• Constant variable

• Dependent variable

• Independent variable

• Control variable

Where is the independent variable typically plotted on a graph?

• On the y-axis

• On the z-axis

• On the x-axis

• On the diagonal

What is the dependent variable in an experiment?

• The variable that is changed on purpose

• The variable that remains constant

• The variable that changes as a result

• The variable that is ignored

How does the dependent variable relate to the independent variable?

• It is unaffected by the independent variable

• It causes the independent variable to change

• It is the same as the independent variable

• It changes as a result of the independent variable

What is the role of a control group in an experiment?

• To eliminate errors

• To change the hypothesis

• To serve as a comparison

• To introduce new variables

What must remain constant in an experiment to ensure a fair test?

• The independent variable

• The dependent variable

• All other variables except the independent variable

• The hypothesis

Why is it important to keep constants in an experiment?

• To change the dependent variable

• To alter the control group

• To ensure the results are due to the independent variable

• To make the experiment more complex

What is an example of a constant in a plant growth experiment?

• Type of plant

• Type of soil

• All of the above

• Amount of sunlight