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Question 10 (1 point) Choose whether the phenomenon below is a positive or negative feedback loop. 1. Human produced carbon dioxide from burning fossil fuels 2. The climate increases due in increase in carbon dioxide 3. Ice melts at the poles due to increased temperatures 4. Albedo decreases, less reflection of sunlight and more absorption of the radiant heat. 5. Earth warms due to less albedo O a positive Ob negative Question 11 (1 point) Choose whether the phenomenon below is a positive or negative feedback loop. 1. Populations use an open access field for grazing their animals 2. The population increases in size due to increase food source 3. Overgrazing causes soil compaction. This decreases grass growth and survival 4. Soil no longer supports native grass growth 5. Population collapses due to eliminated food source. O a positive Ob negative Time left