Experimental Design Review

The one variable you change and test in an experiment to see if it has an effect

• Controlled variables (constants)

• Dependent variable (responding variable)

• Independent variable (manipulated variable)

• Control group

The variables that are kept the same for ALL subjects and samples in an experiment

• Controlled variables (constants)

• Dependent variable (responding variable)

• Independent variable (manipulated variable)

• Control group

The variable you measure in an experiment

• Controlled variables (constants)

• Dependent variable (responding variable)

• Independent variable (manipulated variable)

• Control group

Tags

NGSS.MS-PS2-2

What body system are you measuring the activity of when you are measuring your pulse rate?

• digestive

• circulatory

• excretory

Which body system brings in oxygen into your body?

• immune

• digestive

• respiratory

Which two body systems work together to remove wastes produced by exercising from cells?

• Immune and Endocrine

• Digestive and Skeletal

• Respiratory and Circulatory

• Circulatory and Digestive

What is the DEPENDENT variable (effect) in this experiment?

"Does eating breakfast improve test score?"

• eating breakfast or not

• the grade you got on the test

• what time you get up in the morning

• what you eat for breakfast

What is the INDEPENDENT variable (cause)in this experiment?

"Which type of metal, copper or aluminum, conducts heat faster?"

• size of metal

• types of metal

• time it takes to heat up

• shape of the metal

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A scientist is testing the impact of light and dark on moth behavior by turning a light on and off. The DEPENDENT variable is...

• amount of light

• moth behavior/their reaction

• number of moths

Tags

NGSS.MS-LS2-1

A study was done to determine to figure out if HOW LONG YOU SLEEP affects your TEST SCORE. The INDEPENDENT variable is...

• test scores

• place you sleep

• hours of sleep