1. Habitat and Niche Do Now: 1.What abiotic factors are required for photosynthesis? 2.What abiotic factor is required for aerobic respiration? 3.What biotic factors are directly dependent on an abiotic factor for energy?

2. Ecosystems:

3. Food Chains & Food Webs

4. Habitat: the particular place in which an organism lives.

5. Niche: the unique role an organism plays in its environment.

6. Habitat: Humans & Polar Bears Polar bears can be found on pack ice, coastal islands, coastlines and even out in Arctic waters. They are exceptional swimmers and have been observed in the sea more than 100 miles from the nearest land or pack ice. A majority of human beings live in urban environments Urban Land: 3% of Earth’s land surface 3,500,000,000 people

7. Niche: Humans & Polar Bears Polar bears are strictly carnivores and feed or scavenge only meat. Their primary prey is the ringed seal though they also take bearded, harp and hooded seals and the occasional walrus youngster. They will also scavenge walrus and whale carcasses. Humans generally eat plants and animals grown using technology such as chemical fertilizers and irrigation.

8. Habitat & Niche: Where you live and what you do to get energy (food). 1. Other than humans, what kinds of organisms have you observed in or near your neighborhood habitat? List at least 3. 2. Your cells use aerobic respiration to release the energy stored in the foods you eat. What abiotic factor in the biosphere is required for aerobic respiration?