1. Tides that have one high and one low water per tidal period?

2. The topographic ridge that separates drainage basins?

3. Horizontal outflow of wind from an area. In a surface divergence, outflow originates from the upper atmosphere?

4. A coarse grained igneous rock of intrusive origin that is darker and chemically more mafic than granite?

5. Portion of the stream load that is in solution in the flowing water?

6. A river or stream's rate of flow over a particular period of time?

7. Solar radiation received by the Earth's atmosphere or surface which has not been modified by atmospheric scattering?

8. Spatial boundary that defines the edge of a species geographical range?

9. Ocean current that travels downward into the ocean because of the convergence of opposing horizontal currents or because of an accumulation of seawater?

10. Dome of air that surrounds a city created from the urban heat island effect that traps pollutants like particulate matter?