Measurement & Calculation Practice Test

Front

What is density?

Back

Density is the mass of a substance divided by its volume, typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

How do you calculate percent error?

Back

Percent error is calculated using the formula: Percent Error = |(Experimental Value - Accepted Value) / Accepted Value| x 100%.

Front

What distinguishes a scientific law from a hypothesis?

Back

A scientific law has been subjected to experimental testing and consistently proven to be true, while a hypothesis is an educated guess that has yet to be tested.

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the variable that is measured or tested in an experiment, which is affected by changes in the independent variable.

Front

What is precision in measurement?

Back

Precision refers to the closeness of a set of measurements to each other, indicating the consistency of the measurements.

Front

What is a control group in an experiment?

Back

A control group is a standard of comparison in an experiment that is not exposed to the experimental treatment, allowing for a baseline to measure the effects of the treatment.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

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

What is an independent variable?

Back

The independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What does it mean for a measurement to be valid?

Back

A valid measurement accurately reflects the concept it is intended to measure.