final- # 4

The greenhouse effect is when the sun radiates solar energy on earth. The higher amount of energy is radiated back into space. (1) Greenhouse gases in the atmosphere contribute to global warming by adsorption and reflection of atmospheric and solar energy. (1) The greenhouse effect is the cause for our warming temps. Two factors that affect the greenhouse effect are the shape of Earth's orbit and its tilt with regard to the Sun. (2) Both of these change slowly over the years, when they do they alter the effects of the greenhouse.(2)










Bibliography
1 http://www.lenntech.com/greenhouse-effect/greenhouse-effect-mechanism.htm
2 http://www.scienceclarified.com/Ga-He/Greenhouse-Effect.html

final- #6

There are three different types of plate boundaries, they are: convergent, divergent, and conservative. These plates are found at the edge of the lithospheric plates. (1) Wide zones of deformation are usually characteristic of plate boundaries because of the interaction between two plates. (1) The three boundaries are characterized by their distinct motions. (1) In a divergent boundary, or spreading center, the two plates move away from one another. As the two plates move apart, mid-oceanic ridges are created as magma from the mantle upwells through a crack in the oceanic crust and cools. (1) In a convergent plate movement the plates move together ending up on top of eachother. There are things called subduction zones, they are the location of very stong earthquakes.
Plate tectonics explain the observed evidence for large scale motions of the earth's lithosphere. (2) This theory is just like the continental drift, but they later changed the name to plate tectonics. Plate tectonics are what move the earth, so they cause foor spreading. Volcanos are not usually found around plate tectonics. (3) There is magma around them and most people would consider that a volcano but its not. Plate tectonics do in fact cause earthquakes. When the plates move it causes the earth to crack and then it forms to an earthquake.









Bibliography
1 http://scign.jpl.nasa.gov/learn/plate4.htm
2 http://en.wikipedia.org/wiki/Plate_tectonics
3 http://volcano.und.edu/vwdocs/frequent_questions/grp9/question1066.html

final- #2

A watershed is the line separating neighboring drainage basins. In hilly country, the divide lies along topographical peaks and ridges, but in flat country the divide may be invisible – just a more or less notional line on the ground on either side of which falling raindrops will start a journey to different rivers, and even to different sides of a country or continent. (1) There are three types of watersheds they are: Continental divide, Major drainage divide, and Minor drainage divide. In a continental divide the waters on each side flow to different oceans (1), In a major drainage divide the waters on each side of the divide never meet again, but do flow into the same ocean (1), and in a minor drainage divide is the waters part but eventually meet again at a river confluence (1).
These types of watershed effect what oceans get what water. A drainage basin is an extent of land where water from rain or snow melt drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean. (2) This also involves the other three watersheds. When there is a watershed the water is soaked into the ground and travels to a body of water to create the water cycle. Rivers don’t need to have their water soak into the ground that water is already flowing into a larger body of water, creating a watershed.






Bibliography
1 http://en.wikipedia.org/wiki/Drainage_divide
2 http://en.wikipedia.org/wiki/Drainage_basin