Evaporation and Condensation - Differentiated "Survival" Activity

Objectives: To understand how evaporation is linked to thermal energy transfer
To understand how to change the rate of evaporation/condensation
I have found this works best in small groups where students can discuss ideas. The activity should take about 40 minutes and then another 20 minutes for peer assessment.
Activity overview:
Give higher achievers a text book and lower achievers the accompaning text. I usually allow students to answer whichever questions they wish but generally find that they attempt most.

Students have found themselves stranded on a deserted island with no food, shelter, water or fuel. They have discovered that the island’s inhabitants are only too happy to supply them with the essentials, providing that they share their knowledge of science with them.
Each question asked has point values. At the end of the journey students count up how many points they have accumulated to see how well they were able to survive!