These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres
Answer:
The Continental Divide is important because it separates two major watersheds.
Explanation:
The Continental Divide is a chain of mountain ranges that runs through North America, from Alaska to Panama. This chain of mountain ranges is dividing the continent into two major watersheds. It runs through eastern Alaska, western Canada, western United States, and through the central parts of Mexico and Central America.
The waters from the eastern side of this watershed divide mostly end up in the Atlantic Ocean and its seas, and partially in the Arctic Ocean and its sea. The waters from the western side of this watershed divide end up in the Pacific Ocean and its seas. The eastern watershed has significantly more water running through it than the western one, with the main reason being that the eastern one is significantly larger.
Answer:
the decrease of biodiversity and species
Explanation:
Measured by weight, or biomass, wild animals today only account for four percent of mammals on Earth, with humans (36 percent) and livestock (60 percent) making up the rest.
Answer:
It is more reliable.
Explanation:
A primary source is an immediate firsthand account while a secondary source is a source from someone who wasn't right there normally.
