4.1. Definition of Sample

Try these first

1. 1.

   What is a sample in environmental quality monitoring?

   Hint

   Think about why we take small portions for testing.

2. 2.

   Define concentration in the context of this section.

   Hint

   Recall the formula we discussed.

3. 3.

   What is a sample?

   • A measurement of temperature
   • A portion taken for analysis
   • A type of container

   Hint

   Think about the purpose of collecting samples in studies.

4. 4.

   True or False: The concentration of a substance is calculated as volume divided by mass.

   • True
   • False

   Hint

   Recall the formula we discussed in class.

5. 5.

   You are tasked with measuring lead in a river. Explain how you would choose the sampling volume and instrument based on expected lead concentrations.

   Hint

   Relate the expected concentration to the instrument's detection limits.

6. 6.

   Discuss the challenges presented by different sampling locations in a lake and how this affects measurements of dissolved oxygen levels.

   Hint

   Consider how temperature or algae can affect oxygen levels varied by location.