hard · Enhanced ACT Science
**Experiment 1: Dissolved Oxygen vs Temperature (salinity held at 0 ppt)** | Temperature (°C) | Dissolved O2 (mg/L) |
|---|---|
| 5 | 12.8 |
| 15 | 10.1 |
| 25 | 8.3 |
| 35 | 7.0 | **Experiment 2: Dissolved Oxygen vs Salinity (temperature held at 20 °C)** | Salinity (ppt) | Dissolved O2 (mg/L) |
|---|---|
| 0 | 9.1 |
| 10 | 8.4 |
| 20 | 7.7 |
| 30 | 7.0 |
A certain fish requires at least 8.0 mg/L of dissolved oxygen. Based on Experiment 2, what is the highest salinity at which this requirement is still met?
- 0 ppt
- 10 ppt
- 20 ppt
- 30 ppt
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