Lesson 4.2/4.3 Experiments and Using Studies GOOD

Front

How many variables should be changed purposely in a well-designed controlled experiment?

Back

One variable should be changed purposely in a well-designed controlled experiment.

Front

What are the variables you keep the same in the experiment called?

Back

The variables you keep the same in the experiment are called controlled variables.

Front

What is the main purpose of an experiment?

Back

The main purpose of an experiment is actively producing data and conducting comparisons.

Front

What are the three principles of experimental design?

Back

The three principles of experimental design are Control, Randomize, and Replicate.

Front

What is the difference between an observational study and an experiment?

Back

Experiments involve active data production, while observational studies do not.

Front

Define 'independent variable' in an experiment.

Back

An independent variable is the variable that is purposely changed or manipulated in an experiment.

Front

Define 'dependent variable' in an experiment.

Back

A dependent variable is the variable that is measured or observed in response to changes in the independent variable.

Front

What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.

Front

What does 'replication' mean in experimental design?

Back

Replication refers to repeating an experiment multiple times to ensure that the results are consistent and reliable.

Front

What is 'randomization' in the context of experiments?

Back

Randomization is the process of randomly assigning subjects to different treatment groups to eliminate bias.