Essential Question: According to the Daily Chill, krill count has dropped to an all-time low this season! Penguins rely on krill to survive in the Antarctic. Without krill, the species could go extinct. Apparently, the cause is related to a biotic factor - or one caused by some other living thing in my ecosystem. Could you explore energy transfer in the ecosystem to find the cause of their decline?

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area