U01 Measuring and S.F

Front

What are significant figures (sig figs)?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant figures are in the measurement 100 L?

Back

1 significant figure.

Front

What does it mean for a measurement to be precise?

Back

Precision refers to how close multiple measurements are to each other, regardless of whether they are close to the actual value.

Front

What does it mean for a measurement to be accurate?

Back

Accuracy refers to how close a measurement is to the true or actual value.

Front

Define the term 'systematic error'.

Back

Systematic error is a consistent, repeatable error associated with faulty equipment or a flawed experiment design.

Front

Define the term 'random error'.

Back

Random error is the error that occurs due to unpredictable fluctuations in the measurement process.

Front

How many significant figures are in the measurement 907.0 km?

Back

4 significant figures.

Front

What is the difference between accuracy and precision?

Back

Accuracy refers to how close a measurement is to the true value, while precision refers to how close multiple measurements are to each other.

Front

If Romy measures 6.02 m, 6.04 m, and 6.03 m, how would you describe her measurements?

Back

Her measurements are accurate and precise.

Front

What is the volume of water if the measurement is 21.5 mL?

Back

The volume of water is 21.5 mL.