Practical Skills Quiz

What does validity in an experiment refer to?

• How close repeated measurements are to each other

• How appropriate the experimental method is in addressing the aim

• The precision of the measurements

• The number of repetitions of the experiment

Tags

NGSS.MS-PS2-2

Which of the following is an independent variable in an experiment?

• The variable you measure

• The variable you set

• The variable that is affected by other variables

• The variable you keep constant

Tags

NGSS.MS-PS2-5

How can you improve the reliability of single measurements?

• By repeating the measurements

• By using more precise equipment

• By increasing the number of repetitions

• By fixing control variables and choosing appropriate equipment

What is the relationship between reliability and accuracy?

• One always affects the other

• They are separate aspects of an experiment

• They are unrelated

• They are the same

What is the definition of accuracy in an experiment?

• The number of significant figures in a measurement

• The precision of the measurements

• How close the final result is to the correct or accepted value

• How close repeated measurements are to each other

How can you test the reliability of an experiment?

• By fixing control variables

• By using more accurate equipment

• By repeating the entire experiment and looking at the difference in final results

• By comparing the result to the accepted value

What is the effect of validity on the reliability of an experiment?

• Invalid control variables can make the result unreliable

• Both B and C

• Invalid experiments can still be reliable

• Validity does not affect reliability

What is the correct way to describe the relationship between cause and effect in an experiment?

• Dependent and random variables

• Independent and control variables

• Control and dependent variables

• Independent and dependent variables

How can you improve the accuracy of an experiment?

• By repeating the measurements

• By using more precise equipment

• By increasing the number of repetitions

• By reducing systematic errors

Tags

NGSS.MS-PS1-2

What is the definition of reliability in an experiment?

• How close the final result is to the correct or accepted value

• The number of significant figures in a measurement

• How close repeated measurements are to each other

• The precision of the measurements