Expirimental Variables

In the experiment described, what is the independent variable?

• The length of the goldfish

• The amount of sunlight

• The type of food given to the goldfish

• The size of the fishbowl

What defines an independent variable in an experiment?

• It is the variable that is measured or observed.

• It is the variable that is kept the same throughout the experiment.

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

• It is the variable that provides the numerical data.

Which of the following must be kept constant in the goldfish growth experiment to ensure a fair test?

• The amount of sunlight

• The length of the fish

• The type of food

• The speed of growth

What is the dependent variable in the goldfish growth experiment?

• The pH level of the water

• The amount of sunlight received

• The speed of goldfish growth

• The type of water used

What is the primary characteristic of a dependent variable?

• It is the factor that influences the outcome of the experiment.

• It is the factor that is kept constant across all experimental groups.

• It is the factor that is measured and observed for changes.

• It is the factor that is intentionally altered by the researcher.