The question
Name: ______________________ Date: ____________ Ozone and nitrogen dioxide through a summer day (10 points)
Data
Hourly NO2 and ozone at a city monitor on a clear July weekday and a cloudy July weekday
| Time | NO2, clear day (ppb) | Ozone, clear day (ppb) | Ozone, cloudy day (ppb) |
|---|---|---|---|
| 6 a.m. | 30 | 12 | 10 |
| 8 a.m. | 68 | 18 | 14 |
| 10 a.m. | 62 | 48 | 22 |
| 12 p.m. | 42 | 90 | 30 |
| 2 p.m. | 30 | 115 | 34 |
| 4 p.m. | 34 | 100 | 32 |
| 6 p.m. | 50 | 64 | 24 |
| 8 p.m. | 44 | 36 | 18 |
(a) Identify the time when NO2 peaks on the clear day and the time when ozone peaks on the clear day. Describe how the timing of the two peaks differs. [2 points]
(b) Calculate the percent change in ozone on the clear day from 8 a.m. to 2 p.m. Show your setup. [2 points]
(c) Explain why ozone on the clear day rises after NO2 peaks, naming the role of sunlight. [2 points]
(d) Make a claim about the effect of sunlight on ozone formation, and justify your claim with data from the table. [2 points]
(e) Propose a solution, other than reducing car traffic, that a city could adopt to reduce ground-level ozone, and explain how it works. [2 points]