Stephanie Conducts an Experiment to Learn If Brunettes Have More

question 22

Multiple Choice

Stephanie conducts an experiment to learn if brunettes have more fun.She has three brunette female friends and three blonde female friends go to the same party,and record how many times they are asked to dance.In her experiment,Stephanie has defined her ____________ as the number of times the friends were asked to dance,and her ____________ as hair colour.

• A) independent variable;extraneous variable
• B) extraneous variable;dependent variable
• C) independent variable;dependent variable
• D) dependent variable;independent variable

---

Definitions:

Thermostat

A thermostat is a device used to control the temperature of a system so that the system's temperature is maintained near a desired set-point by regulating the flow of heat energy into or out of the system.

Degrees Fahrenheit

Degrees Fahrenheit is a unit of temperature where water freezes at 32 degrees and boils at 212 degrees under standard atmospheric conditions.

Mixture

A substance made by combining two or more different materials without chemical bonding or other chemical changes, so that each material retains its own properties.

Pounds

A unit of weight commonly used in the United States and the British imperial system, equivalent to 0.453592 kilograms.