| Hint | Answer | % Correct |
|---|---|---|
| Percipitation that has become more acidic than normal. | acid rain | 81%
|
| A collection of islands in a sea. | archipelago | 79%
|
| The mixture of gases, aerosols, solid particles, and water vapor that envelops the Earth. | atmosphere | 77%
|
| A bound collection of maps. | atlas | 73%
|
| The height of an object in the atmosphere above sea level. | altitude | 67%
|
| A pair of points on the Earth's surface that are diametrically opposite to each other | antipodes | 19%
|
| An underground layer of water-bearing permeable rock, rock fractures, or unconsolidated materials such as gravel, sand, or silt. | aquifer | 13%
|
| A deep gully cut by a stream that flows only part of the year; a dry gulch. | arroyo | 10%
|