Part 4 Populate a world! The premise is quite simply to pick a known planet or moon from Table 4 (below) that you think is the most likely to have active life, then to consider the conditions and choose two extremophiles that might have evolved on it. Bear in mind that we know there is not human-like life on these worlds, so there is no reason for you to discuss parameters related to human life. Table 4: These are the worlds from which you must choose. Use the Format below to structure your answers to question 16, failure to do so will result in lost marks. A) My world is: B) Three (3) points on conditions there and why they permit life to exist there today. C) Extremophile A. Extremophile B If you do not structure your answer as directed, you will lose marks. Question 11A: Choose a world from Table 4 Part A is four words including My world is... Question 11B: 120 words total Make three points justifying why you think currently active life is most likely to exist on your world using the known conditions/state of that world. Examples of things that you might consider briefly addressing if relevant: Water Atmosphere Heat/energy Building blocks of life (C, N, O, S, P) Do not state that the body having gravity enables life, all planets and moons have gravity. An example: The planet Dagobah is known from the Jedi mission to have an atmosphere of nitrogen and oxygen that can support life. Dagobah was shown by the Skywalker probe to have liquid water. Dagobah was shown by the R2D2 probe to have complex molecules on its surface. Question 11C: For this part you will reference the extremophile types listed below. Identify two (2) extremophile types from the list of 13 types (below) that could populate your planet. Write one (1) sentence for each of your two selected extremophile types, stating why/where it could inhabit your planet. Each sentence may be no longer than 40 words. An example: Acidophiles might be able to live on the planet Kobol since it appears to have acidic pools on the surface. Acidophile: An organism that grows best at acidic (low) pH values. Alkaliphile: An organism that grows best at high pH values. Anaerobe: An organism that can grow in the absence of oxygen. Endolith: An organism that lives inside rock or in the pores between mineral grains. Halophile: An organism requiring high concentrations of salt for growth. Methanogen: An organism that produces methane from the reaction of hydrogen and carbon dioxide, a member of the Archaea. Oligotroph: An organism with optimal growth in nutrient limited conditions. Piezophile (Barophile): An organism that lives optimally at high hydrostatic pressure. Psychrophile: An organism with optimal growth at temperature 15 C or lower. Thermophile: An organism with optimal growth at temperature 40 to 80 C . Hyperthermophile: An organism with optimal growth at temperature 80 C or higher, an upper limit is likely about 122C. Toxitolerant: An organism able to withstand high levels of damaging elements .

1. Part 4 Populate a world!
The premise is quite simply to pick a known planet or moon from Table 4 (below) that you think
is the most likely to have active life, then to consider the conditions and choose two
extremophiles that might have evolved on it. Bear in mind that we know there is not human-like
life on these worlds, so there is no reason for you to discuss parameters related to human life.
Table 4: These are the worlds from which you must choose.
Use the Format below to structure your answers to question 16, failure to do so will result in lost
marks.
A) My world is:
B) Three (3) points on conditions there and why they permit life to exist there today.
C) Extremophile A.
Extremophile B
If you do not structure your answer as directed, you will lose marks.
Question 11A: Choose a world from Table 4
Part A is four words including My world is...
Question 11B: 120 words total
Make three points justifying why you think currently active life is most likely to exist on your
world using the known conditions/state of that world.
Examples of things that you might consider briefly addressing if relevant:
Water
Atmosphere
Heat/energy
Building blocks of life (C, N, O, S, P)
Do not state that the body having gravity enables life, all planets and moons have gravity.
An example:
The planet Dagobah is known from the Jedi mission to have an atmosphere of
nitrogen and oxygen that can support life.
Dagobah was shown by the Skywalker probe to have liquid water.
Dagobah was shown by the R2D2 probe to have complex molecules on its surface.

2. Question 11C: For this part you will reference the extremophile types listed below.
Identify two (2) extremophile types from the list of 13 types (below) that could populate your
planet. Write one (1) sentence for each of your two selected extremophile types, stating
why/where it could inhabit your planet. Each sentence may be no longer than 40 words.
An example: Acidophiles might be able to live on the planet Kobol since it appears to have
acidic pools on the surface.
Acidophile: An organism that grows best at acidic (low) pH values.
Alkaliphile: An organism that grows best at high pH values.
Anaerobe: An organism that can grow in the absence of oxygen.
Endolith: An organism that lives inside rock or in the pores between mineral grains.
Halophile: An organism requiring high concentrations of salt for growth.
Methanogen: An organism that produces methane from the reaction of hydrogen and carbon
dioxide, a member of the Archaea.
Oligotroph: An organism with optimal growth in nutrient limited conditions.
Piezophile (Barophile): An organism that lives optimally at high hydrostatic pressure.
Psychrophile: An organism with optimal growth at temperature 15 C or lower.
Thermophile: An organism with optimal growth at temperature 40 to 80 C .
Hyperthermophile: An organism with optimal growth at temperature 80 C or higher, an upper
limit is likely about 122C.
Toxitolerant: An organism able to withstand high levels of damaging elements (e.g., pools of
benzene, nuclear waste).
Xerophile: An organism capable of growth at very low water activity.