Essential+Questions

1.

128/1 x 3/4 = 96 bottles 128 - 96 = 32 remaining bottles 32 bottles 8 bottles per person 500 mL = .5 L/bottle .5 L x 8 bottles = 4 L in 8 bottles
 * **One human being needs at least 2 quarts or 1.8927 L of water per day to survive on the tropical island.**
 * **Those remaining on the island only have 32 bottles which is 8 bottles per person. 8 bottles per person is equivalent to about 4 liters per person.**
 * **3.79-4L = 10.5 days in 90 degree shade.**

2. Water does not need to reach the boiling point of 212 degrees F or 100 degrees C, the water only has to be heated to about 185 degrees F or 85 degrees C. Although, being stranded on a deserted island, you probably will not have a thermometer so to be safe you could just bring it to a boil. Also, you do not know where that water has been and what may be in it so you should treat all water like it is contaminated. When purifying the water, it is crucial that you bring it to a boil in a container that will not melt above a fire. Boiling it will eliminate most--if not all--of the particles that are too small to be filtered. You also do not have to let it boil for any length of time; once it boils it is ready to be taken off the heat.

3. My group and I //will// use trial and error, although every trial will start with a thought out plan. A well thought out plan will involve teamwork and focus. One reason for creating a strategy first is because it is good organization. It is also better than just trying something without thinking about a solution, because you have thought thoroughly about what actions you are going to take before you try it as a group.