Is there water on Mars?

This module from the Mars Exploration Curriculum revolves around the question of whether there is water on Mars. By experimenting with water as it changes state and investigating some effects of air pressure on water's boiling temperature, students not only learn core ideas in physical science but can deduce the water situation on Mars by applying those concepts. They use evidence from their work as well as data and images from NASA's missions to Mars to take a position on whether there was ever water on Mars. Educational levels: High school