Adopt Geylang River 2013

1. DUNMAN HIGH SCHOOL德 明 政 府 中 学 Adopt Geylang River 2013 Student Activity Kit Group Members:______________( ) ______________( ) ______________( ) ______________( ) ______________( ) ______________( ) Class: 1/___ Y1 Service Learning Y1 Service Learning Committee

2. Instructions • Reporting Time/Venue: 2:30pm in classroom • Dismissal Time/Venue: 5:30pm in classroom • Get into your respective groups (according to allocation by SL Ambassadors) to: a) Make final touches to your device b) Complete pg 10 – 11 of your activity kit c) Read pg 6 - 9 on water testing procedures in your activity kit • You are given 30 minutes to do so before setting off to Geylang River at 3pm. 2. Before setting off to Geylang River, make sure that your group receives the following items from your teacher: a) 1 pair of tongs c) 1 trash bag d) 1 water testing kit + 1 thermometer e) 1 student activity kit f) 1 disposable glove per student Y1 Service Learning Committee

3. Instructions • Each group is to conduct water testing at 3 checkpoints in the following order: a) Bridge 1 b) Pathway [opposite the last red house] c) Bridge 2 (Under Expressway) [Refer to pg 6-9 on water testing procedures] • Do record your data on page 13 of your activity kit. 4. At the last checkpoint, observe any river life and types of litter found in the river near Bridge 2 and record your observations in your student activity kit. (Pg 14-18) 5. You will pick up litter along the Park after completion of water testing - Remind each other to keep to the side nearer to DHS, and not to cross the bridge to the other side of the river. - You are not to enter any construction site at the end of the river bank. - You are to record the raw data of the type and quantity of litter picked in the student activity kit. (Pg 19) Y1 Service Learning Committee

4. Instructions 6. After the clean up, tie up your trash bags and place them beside any dustbin at the river bank. • At the end of the clean-up (around 4.45pm), make your way back to your classroom. • Wash up (esp. clean your hands) before completing your reflections in the student activity kit as well as debrief conducted by your teachers. • Water kits and completed student activity book are to be returned to your teacher. Y1 Service Learning Committee

5. Content of Water Testing Kit • 1 long test tube • 1 small test tube • 4 pH tablets • 8 Dissolved Oxygen (DO) tablets • 1 chart Y1 Service Learning Committee

6. Water Testing- A Simple Step by Step Guide Step 1: Test for Air and Water Temperature • Measure the air temperature using the thermometer provided and record it in the Student Activity Kit. Be careful when handling the thermometer. • Pour water collected using the device assembled by your group into the container till the line marking. • Insert the thermometer into the container, hold for 1 minute to measure the temperature of the water sample. Y1 Service Learning Committee

7. Water Testing- A Simple Step by Step Guide Step 2: Test for Turbidity (Clarity) • Look at how the mark appears when the sample water is in the container. Cross compare with the chart to read the water’s turbidity. For instance, if the mark looks in between 0 JTU and 40 JTC, then it’s estimated reading is 20 JTU. Y1 Service Learning Committee

8. Water Testing- A Simple Step by Step Guide Step 3: Test for Dissolved Oxygen • Using the small test tube, place 2 tablets for DO testing inside the test tube filled with water sample. • Now, continuously shake the test tube for 10 minutes for the tablet to dissolve and the chemical to react. • After 10 mins, look at the colour of the water. Which shade is it closest to? What would be the level of dissolved oxygen? Y1 Service Learning Committee

9. Water Testing- A Simple Step by Step Guide Step 4: Test for pH value (Acidity) • Fill the test tube with water sample up to 10ml and place 1 pH tablet into the water sample. • Shake continuously for 5 minutes. • What’s the colour of the water sample in test tube? Cross compare against the chart for the pH value. Y1 Service Learning Committee

10. Designing A Device • In your groups, design a device which will allow you to scoop water from Geylang river to be tested for pH, dissolved oxygen, temperature and turbidity. Brainstorming Session [List out problems and possible solutions] e.g. Density of device to sink into river to collect water, method used to lower device into river and raising it up. Problems Solutions Y1 Service Learning Committee

11. Designing A Device Sketch of design Materials needed: Y1 Service Learning Committee

12. Reflection Effectiveness of device Ways to improve Y1 Service Learning Committee

13. Water Testing Y1 Service Learning Committee

14. I spy with my Little Eye… This is a warm - up exercise to test your observation powers. Look at the river, what can you see? ( You may tick more than one) • Substrate: • Sandy • Muddy • Rocky Colour of the River: ------------------------------------ Activities of other people at the river: -------------------------- -------------------------- -------------------------- -------------------------- -------------------------- -------------------------- -------------------------- Other observations: ------------------------------ ------------------------------ ------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------------------------- Y1 Service Learning Committee

15. Protecting Our River • Objectives: • To identify the river life and types of litter found in Geylang river and Geylang park during the clean-up. • To identify the effects of litter on the river life. • To suggest what you, as a student, can do to help protect our Geylang river (i.e. reduce the amount of litter in the river) as well as how you can influence your peers to do the same. • In your own groups, discuss and plan your roles. E.g. one of you can be the data recorder, two of you can look out for river life/litter and the remaining three to pick up litter. • Collection of raw data is to be done during the river clean-up. • Record your data on the data sheets provided in your activity book. Instructions Y1 Service Learning Committee

16. Data Sheet River Litter Y1 Service Learning Committee

17. Data Sheet River Life Encountered Y1 Service Learning Committee

18. Effects of litter on the river life Litter Effects Y1 Service Learning Committee

19. Data Sheet Park Litter Y1 Service Learning Committee

20. Suggestions Suggest what you, as a student, can do to help protect our Geylang river (i.e. reduce the amount of litter in the river) as well as how you can influence your peers to do the same. Y1 Service Learning Committee

21. Crossword Puzzle 5 9 Across • A pH less than 7 is ____. • Cold water holds ____ oxygen than warm water. • A pH of 7 is ____. • A low level of this will not support living organisms and will result in an unhealthy water body. • The information collected while monitoring water. 10 8 1 2 7 6 3 4 6. A natural or artificial pond or lake used for the storage and regulation of water. Down The contamination of soil, water or the atmosphere by the discharge of harmful substances. The air, water, minerals and animals surrounding and affecting a given organism at any time is called the ____. Varies throughout the day and affects the amount of oxygen that water can hold. A clear, colourless, odourless and tasteless liquid that is essential for plant and animal life. Y1 Service Learning Committee