Gr 6 -
per. 2 - 5 Star Note Questions
per. 3 - 5 Star Note Questions plus answer this: Which of the three chemicals has the highest allowed concentration (from the list on p. C-59): 
Iron      100 ppb
Nitrates 10 ppm
Copper   1.3 ppm

Gr. 8 -
per. 5 - Answer Anlaysis Questions:
1. What other information do you wish you had known before making a final decision?
2. Write a letter to the National Government Council stating your recommendation for which of the four missions to fund?  Convince the council with evidence you gathered in this activity and unit. Be sure to present the trade-offs of your recommendation.
per.6 - Fill out the T-chart giving at least one advantage and disadvantage for each of the 4 proposed missions (A - Pluto, Unpiloted; B - Mars, piloted; C- Titan Unpiloted; D - Moon, piloted).