Units, types of measurements and types of error

What are direct measurements?

• Measurements that are calculated using other measurements
• Mistakes that occur during the experimental setup
• Significant and obvious mistakes that occur during the measurement process
• Measurements that are taken directly from instruments

What can cause random errors?

• Human limitations in reading instruments
• Limitations in the precision of measurement instruments
• Natural variability
• Faulty calibration or instrumental biases

What is a unit of measurement?

• A practical example of a measurement
• A type of error encountered in scientific investigations
• A fundamental quantity used to express measurements
• A standardized framework for comparing and communicating measurements

What are gross errors?

• Tools used to measure length
• Significant and obvious mistakes that occur during the measurement process
• Mistakes that result from misreading instruments
• Mistakes that occur during the experimental setup

Which one of these units is from the International System (SI)

• meters

• yards

• inches

• pounds

What is an indirect measurement?

• Measurement obtained by combining base units
• Measurement obtained by measuring something else

• Measurement obtained by estimating
• Measurement obtained by using derived units

Which of the following is an example of a random error?

• Recording data incorrectly
• Misreading an instrument
• Fluctuations in environmental conditions
• Setting up an experiment improperly

What is systematic error?

• Random error in measurements
• Error that consistently occurs in the same direction
• Error caused by faulty equipment
• Error that occurs due to human error

What is a random error?

• An unpredictable and fluctuating error
• An error caused by limitations in the precision of measurement instruments
• An error that consistently shifts measurements in a particular direction
• An error due to human limitations in reading instruments

What is an indirect measurement?

• Measurement obtained by combining base units
• Measurement obtained by comparing to a known standard
• Measurement obtained by estimating
• Measurement obtained by using derived units