Assignment 4: Mid-Term Exam
Question 1 - Permafrost Permafrost is a thick sub-layer of ground comprising of soil, rocks, ice, or organic materials, which remains frozen for at least two sequential years. It forms the sub-surface soil layer of Polar Regions such as the arctic region. - Great Lakes-St. Lawrence Hardwood Forest Ecotone An ecotone describes an area of transition that occurs between biomes. An example of such an area occurs in northern Ontario between the Great Lakes- St. Lawrence and the boreal forests (Liu). The Boreal forest changed into the St. Lawrence wood nearly 7,400 years ago (Liu) ...
