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.

Aletsch glacier is the largest glacier in switzerland and the largest found in the alps, a mountain range which extends from monaco in the east to slovenia in the west. currently, the aletsch glacier is retreating. under what circumstances would this glacier see growth instead of retreat? a decline in plate tectonics across the mountain range annual snowfall that exceeds yearly losses an increase in ablation in the southern valleys a rise in temperatures to that of a mediterranean climate