Understanding Variables in Experiments

What is the role of the independent variable in an experiment?

• It is the variable that is measured by the experimenter.

• It is the variable that is directly manipulated by the experimenter.

• It is the variable that remains constant throughout the experiment.

• It is the variable that is dependent on other variables.

How can you remember the function of a dependent variable?

• It is the variable that remains unchanged.

• It is the variable that may depend on the independent variable.

• It is the variable that is manipulated by the experimenter.

• It is the variable that is independent of other variables.

In the example given, what is the dependent variable when considering the effect of ice cream consumption?

• The time of day when ice cream is consumed.

• The temperature of the environment.

• The number of snake bites.

• The amount of ice cream consumed.

What is a major challenge in conducting long-term experiments on diet and health?

• Ensuring participants do not change their diet.

• Finding a large enough sample size.

• Measuring the exact amount of food consumed.

• The high cost and time required for such studies.

Why are long-term experiments considered valuable despite their challenges?

• They are easier to conduct than short-term studies.

• They require fewer participants.

• They can establish causal relationships between variables.

• They provide immediate results.