1. What causes Landslides

2. Is what causes a landslides is ground, rocks, the movement, earthquakes, fire, bedrock, water. They usually start on a steep hillside. Its speed is about 10 miles per hour, But can exceed 35 miles. $3.5 Billion in damage and kill between 25 and 50 people.

3. What effects landslides

4. For example, Logan and Schuster noted developed of a new species of cutthroat trout in lake Crescent, a still existing, prehistoric landslide-dammed lake on the Olympic Peninsula of the State of Washington, u.s.a. For several thousand years.

5. The Causes of volcanoes

6. The earth has “plates” and when two plates hit each other, one goes under and becomes “molten” which means it gets so hot, the ground turns into liquid. The molten stuff finds a hole in the ground and comes out the top. All of the continents used to be just one big piece of land, but the land broke up and floated away and created the 7 continents we have now. This was called continental drift. If you look at South America, it looks like it could fit like a puzzle piece into Africa.

7. The effect of volcanoes

8. Volcanic eruptions have a lasting effect on our Earth
Volcanic eruptions have a lasting effect on our Earth. When pyroclastic material is blasted up into the air, there is not only the effect of various sized rocks and ash falling back to the earth, but also the lasting effects of finer ash and dust spreading around the earth. But it isn't only pyroclastic material that leaves its imprint on the earth: lava and missing earth change things as well.

9. What causes earthquakes

10. The short answer is that earthquakes are caused by faulting, a sudden lateral or vertical movement of rock along a rupture (break) surface.     Here's the longer answer: The surface of the Earth is in continuous slow motion. This is plate tectonics--the motion of immense rigid plates at the surface of the Earth in response to flow of rock within the Earth. The plates cover the entire surface of the globe. Since they are all moving they rub against each other in some places (like the San Andreas Fault in California), sink beneath each other in others (like the Peru-Chile Trench along the western border of South America), or spread apart from each other (like the Mid-Atlantic Ridge). At such places the motion isn't smooth--the plates are stuck together at the edges but the rest of each plate is continuing to move, so the rocks along the edges are distorted (what we call "strain"). As the motion continues, the strain builds up to the point where the rock cannot withstand any more bending. With a lurch, the rock breaks and the two sides move. An earthquake is the shaking that radiates out from the breaking rock.

11. What effect earthquakes

12. Most earthquake-related deaths are caused by the collapse of structures and the construction practices play a tremendous role in the death toll of an earthquake. In southern Italy in 1909 more than 100,000 people perished in an earthquake that struck the region. Almost half of the people living in the region of Messina were killed due to the easily collapsible structures that dominated the villages of the region. A larger earthquake that struck San Francisco three years earlier had killed fewer people (about 700) because building construction practices were different type (predominantly wood). Survival rates in the San Francisco earthquake was about 98%, that in the Messina earthquake was between 33% and 45%) (Zebrowski, 1997). Building practices can make all the difference in earthquakes, even a moderate rupture beneath a city with structures unprepared for shaking can produce tens of thousands of casualties.