TASK 1: Planning lab (option to do it in pairs)
- Aim: to measure the air quality by collecting air particulates (ppm) around various sites within the College campus.
- http://www.nea.gov.sg/psi/ – link to Singapore government ‘haze’ and air quality updates which could be useful as background information and discussion.
TASK 2 – ONLINE LAB: This is a good review of productivity and a perfect connection with direct methods for measuring dissolved oxygen (DO) in water (click here: Online lab DO) – Focus questions: Why do we measure DO? What does a high/low reading tell us about water quality?
Class activity – Describe and evaluate the methods for measuring DO (based on this video) and class discussions:
TASK 3: BOD – Kick Sampling and Citizen’s Monitoring Biotic Index to identify species and their tolerance which reveals water quality (refer to handouts).
- In class you have simulated the indirect method of collecting water invertebrates in a stream (see some class video clips below)
- You have collected a sample of invertebrates using the ‘kick sample’ method which can now describe.
- Now that you have your sample, you will use the Citizen Monitoring Biotic Index to identify your species and determine the whether it is a healthy river or a polluted river, based on your sample of invertebrates (varying tolerance levels).
- Watch this tutorial and pause as needed so you can complete the activity along with the tutorial.
- You can find the tutorial here – A short instructional video on how to understand the health of a water body using a citizen guide biotic index and macroinvertebrate samples.
Student Video Clips: