A video micro-lecture that describes the phase diagrams of water on Earth, Mars, and Venus. It also describes the water vapor feedback mechanism in the atmospheres of these planets that influences the greenhouse effect.

Students will understand the stable phases of water at various temperatures on Earth. They will be able to explain the concept of water vapor feedback on Earth’s atmosphere by using the phase diagram of water and compare it to that of Mars and Venus. Students will understand how the water cycle on Earth makes its climate more suitable to support life while the runaway greenhouse effect of water vapor on Venus makes it uninhabitable.