Unit 1 Review

Front

How many inches are there in a football field (100.0 yards)?

Back

3600 inches

Front

What is the definition of precision in measurements?

Back

Precision refers to the consistency of repeated measurements, regardless of their accuracy.

Front

What is the definition of accuracy in measurements?

Back

Accuracy refers to how close a measured value is to the true value.

Front

How do you calculate percent error?

Back

Percent error = |(Measured Value - True Value)| / True Value × 100%.

Front

What is the SI unit for mass?

Back

The SI unit for mass is the kilogram (kg).

Front

What is the SI unit for amount of substance?

Back

The SI unit for amount of substance is the mole (mol).

Front

Back

0.000399 g

Front

What is the formula for converting yards to inches?

Back

1 yard = 36 inches, so multiply the number of yards by 36.

Front

If a balance shows a weight of 34.85 grams for an object with a true mass of 35.0 grams, what is the percent error?

Back

0.4%.

Front

What is the difference between systematic error and random error?

Back

Systematic error is consistent and repeatable, while random error varies unpredictably.