Problem
You can't breath in space without an oxygen tank or a pressurized dome to keep the oxygen in and out stand the vacuum of space. And you also need to eat and drink to survive. There is no food or water in space and there is not much storage for food or water.
Science
Earth has an atmosphere of breathable air. In space there is no atmosphere or oxygen. We need to breathe oxygen to live so we need to find a way to carry or create oxygen in space.
Update
so this is a quick slideshow we have made so far of what sort of things you need to survive in space or on the moon.