This unit is designed to deepen student understanding of atomic structure, trends on the periodic table, and how atomic-level interactions influence bulk-scale properties. The unit focuses on what substances we would need to find, make, and recycle in order to successfully live and work beyond Earth, or in space. Lesson Set 1 has students investigate properties of different liquids and their interactions with surface materials. Students use this information to predict which liquid or event resulted in a land formation on Earth, the Moon, or Mars. Lesson set 2 has students fully develop atomic structure and use patterns in how different elements interact with each other to build out the periodic table. Students then are able to relate bulk-scale properties to atomic-scale interactions, like electronegativity. Students continue to connect the atomic- and bulk-scale properties in Lesson Set 3. They use the law of conservation of matter as they balance chemical equations. In Lesson Set 4, students focus on how we can recycle substances by investigating how differences in the structures of the substance affect our ability to recycle it into different substances.