| 作者 (Author) | Stewart, Melissa |
| Summary: This introduction provides information about Earth's water, including rivers, lakes, oceans, the water cycle, climate, water pollution, and conservation. | |
| 等级 (MML) | MM Level-4.6 |
| 年级 (IL) | Lower Grades (LG K-3) |
| 字数 (Words) | 2067 |
| 类型 (Fiction) | Non-Fiction |
| 系列 (Series) | National Geographic Readers: Level 3; National Geographic Kids; |
| Topic: Science-Natural Resources; Science-Conservation; Social Issues-Environmental Issues; | |
