A researcher measures the density of a sample of brackish water collected from an estuary.
She uses a graduated cylinder and a digital mass balance.
State the equation linking density, mass, and volume.
Which of the following is a correct SI unit for density?
Complete the table to show what is measured by a digital mass balance.
| Measuring instrument | Quantity measured |
|---|---|
| graduated cylinder | volume |
| digital mass balance | [Answer Here] |
Describe how the researcher should use each instrument to make her measurements as accurate as possible.
The researcher wants to ensure her experiment is a fair test when comparing water samples from different locations.
State one factor about the environmental conditions that she should keep the same throughout her experiment.
Why is it important that she keeps this factor constant?
