1. list five ways that organisms, including humans, change the earth. what kinds of earth processes are unaffected by humans and other organisms?
2. only 0.64 percent of the earth's water is fresh and liquid - the rest is salty seawater or is frozen in glaciers. what are the environmental implications of such a small proportion of freshwater?
3. describe in your own words the geosphere, the hydrosphere, the atmosphere, and the biosphere.