H2O Molecule
作者：Carrissa Hsieh
1. SOLID
1.1. Below surface of Earth at 273K
1.2. At surface of Mars
1.3. In our Solar System
2. GAS
2.1. Hydrogen and Oxygen
3. LIQUID: WATER
3.1. At temperatures of living things
3.2. At temperatures of Earth's surface
3.3. At some temperatures below Mars' surface
