Scientific Variables

What is a constant or control in a scientific experiment?

• All the factors that stay the same in an experiment.

• The variable that is changed during the experiment.

• The outcome that is measured in the experiment.

• The hypothesis that is tested in the experiment.

What is the definition of a dependent variable?

• The factor that you measure in an experiment.

• The variable that is manipulated by the researcher.

• The constant factor that remains unchanged.

• The outcome that is predicted by the independent variable.

What is the relationship between independent and dependent variables?

• The independent variable is manipulated to observe its effect on the dependent variable.

• The dependent variable is manipulated to observe its effect on the independent variable.

• Both variables are always equal in value.

• Independent variables do not affect dependent variables.

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

• To determine its effect on the dependent variable.

• To measure the outcome of the experiment.

• To control the conditions of the experiment.

• To provide a constant reference point.

Can there be multiple independent variables in a single experiment?

• Yes, multiple independent variables can be used to test different factors.

• No, there should only be one independent variable to ensure clear results.

• It depends on the type of experiment being conducted.

• Independent variables can be combined to create a more complex experiment.

What is an example of a dependent variable in a plant growth experiment?

• The amount of sunlight the plants receive.

• The type of soil used for planting.

• The height or biomass of the plants.

• The number of seeds planted.

How can changing multiple variables at once affect an experiment?

• It can lead to inconclusive results, making it difficult to determine which variable caused the effect.

• It simplifies the analysis by isolating each variable's impact.

• It ensures that the results are always valid and reliable.

• It allows for a quicker conclusion without the need for further testing.

What is the role of controls in an experiment?

• To provide a baseline for comparison against the experimental group.

• To ensure that the experiment is conducted in a controlled environment.

• To manipulate the variables in the experiment.

• To increase the sample size of the experimental group.

In an experiment, what is the dependent variable?

• The factor that is measured, such as the size of sunflower in Steve's experiment.

• The variable that is changed or controlled in a scientific experiment.

• The constant factor that remains unchanged throughout the experiment.

• The initial condition that sets the stage for the experiment.

What is the first step in designing an experiment involving variables?

• Identify the research question and determine the independent and dependent variables.

• Formulate a hypothesis based on previous research.

• Collect data from a sample population.

• Analyze the results to draw conclusions.