Answer the following questions on paper:

0. Did you observe anything unique or unusual about the pond environment?

1. Create a spreadsheet that includes data for Day One and Day Two. Refer to Technical Hints to see how to use a spreadsheet.

2. Transfer the probe data to the spreadsheet. Refer to Technical Hints to see transfer data to your spreadsheet.

3. Create an x-y line graph of your data for each probe. Refer to Technical Hints to see make an x-y line graph.

4. After observing your graph, are the readings for light, pH, and DO (optional) within a reasonable range? Use information from past activities to explain your reasoning. Why was it important to take the readings around the same time of day?

5. Create a spreadsheet for Day Two. Refer to Technical Hints to see how to use a spreadsheet.

6. Transfer the probe data to the spreadsheet. Refer to Technical Hints to see transfer data to your spreadsheet.

7. Create an x-y line graph of your data for each probe. Refer to Technical Hints to see make an x-y line graph.

8. After observing and comparing the graphs from both days, did the readings for light, pH, and DO (optional) change from Day One? If they did, can you explain why?

9. Is there any relationship between the light level and the pH or DO? Describe your reasoning.

10. Write a paragraph about the health of your pond. Use any evidence that you collected during your monitoring of the pond.