1. Long Flight Survival: Water purification How could we get drinking water from the large amounts of wastewater that we generate on this mission?

2. Where does the waste water come from? Urine Sweat Breath from respiration Coolants for the many heat generating machines Transpiration from plants in the spacecraft’s garden

3. Your challenge is, using this lab apparatus, set up a water purification still which would give you, over enough time, water fit to drink. Large beaker Small beaker 15 x 15 cm kitchen foil 15x 15 cm black paper 3 x strong rubber bands In pairs, design a suitable still. You have 15mins to produce a diagram showing how it could be set up

4. Possible design for a solar still

5. Now explain how your solar still works. Use the following words solid liquid gas solution solvent solute evaporate water molecules condense