Tutor profile: Jason S.
Subject: Natural Sciences
List one major threat to life on earth posed by a changing climate.
Examples: species will no longer have enough habitat to use, rising sea levels will change the land form, salinity changes, warmer temperatures cause cold-loving species , etc.
Subject: Environmental Science
Name three examples of regulated water pollutants and provide examples of sources of each.
1. nitrogen (ex: agricultural animal waste) 2. phosphorous (ex: fertilizer runoff from cropland) 3. sediment (ex: from exposed earth at construction sites)
Define the four levels of ecological organization and provide one example of each.
1. organism/species: a single living thing (ex: a single mouse) 2. population: a group of organisms that belong to the same species and live in an area where the regularly interact with each other. (ex: all of the mice living in a forest) 3. community: all of the populations of organisms that inhabit the same area and interact with each other regularly (ex: populations of mice, rabbits, foxes, trees, flowers etc. that live in a forest) 4. ecosystem: all of the populations that occupy the same area (biotic) as well as all of the non-living matter (abiotic) in an area, as well as their interactions. (ex: all of the populations of mice, rabbits, foxes, trees, flowers plus the soil, air, rocks, and more in a forest)
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