Lesson 5 Experimental Design and Variables

Front

What is an independent variable?

Back

The independent variable is the variable that is changed on purpose in an experiment. It is what the experimenter manipulates to observe its effect.

Front

What is a dependent variable?

Back

The dependent variable is the variable that is measured in an experiment. It is affected by changes in the independent variable.

Front

What is a controlled variable?

Back

Controlled variables are the factors that are kept constant throughout an experiment to ensure that the results are valid.

Front

What is the purpose of an experiment?

Back

The purpose of an experiment is to test a hypothesis by manipulating variables and observing the outcomes.

Front

In the experiment 'Which type of metal, copper or aluminum, conducts heat faster?', what is the independent variable?

Back

The independent variable is the types of metal (copper or aluminum).

Front

In the experiment 'Do tall people jump further than short people?', what is the dependent variable?

Back

The dependent variable is how far the person jumps.

Front

What does it mean to control variables in an experiment?

Back

Controlling variables means keeping certain factors constant to ensure that the results are due to the independent variable only.

Front

Why is it important to have a control group in an experiment?

Back

A control group provides a baseline for comparison, helping to determine the effect of the independent variable.

Front

What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between the independent and dependent variables.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.