Igneous rocks can form in two environments that are very different. All igneous rocks came from magma. Changing from magma to rock the magma either freezes or crystallizes. When it cools fastly the crystals are small, but when it takes a long time to cool the crystals are large. Magma can complaetely crystallize into a crystal or even a diamond.
It turns into a river because of all the water the mountains have and then creates a path. Rivers cause erosion. Runoff from rivers cause rocks to erode. Because of gravity, runoff, and the sediment it has, to move downhill. An example of this sheet erosion.
These P waves are able to travel through both solid rock, such as granite mountains, and liquid material, such as volcanic magma or the water of the oceans. The slower wave through the body of rock is called the secondary or S wave. As an S wave propagates, it shears the rock sideways at right angles to the direction of travel. If a liquid is sheared sideways or twisted, it will not spring back, hence S waves cannot propagate in the liquid parts of the earth, such as oceans and lakes. The actual speed of P and S seismic waves depends on the density and elastic properties of the rocks and soil through which they pass.
J. Subbiondo © 2004The CrustThe outer layer of the Earth is called the crust. It is made up of rock that floated to the surface when the Earth was formed. It is not a continuous layer, but is made up of large masses called tectonic plates.These plates drift slowly across the Earth's surface (tectonic means moving).The movement of these plates creates mountains and valleys.At weak points in the crust, it causes volcanic eruptions. And when plates bump into each other, earthquakes occur -- emitting shock waves or vibrations called seismic waves. The crust is the Earth's coldest layer.
Second, the process of the two natural events is different than each others. The volcano usually happens and forms near the plates boundaries of the ground. First, the crust is moving a little bit and causing melt because of decreasing the
Rainwater and melted snow and ice that move too quickly to infiltrate the ground become runoff. Runoff replenishes the water on Earth's surface and helps to continue the water cycle. The next step in the cycle — evapotranspiration — returns water to the atmosphere. The Sun causes evaporation by heating liquid water on Earth's surface. Transpiration — the evaporation of water from pores in the leaves of plants — also releases water vapor into the atmosphere.
Rising air currents take water, as vapor, up into the atmosphere; with the water form of "evapotranspiration," which is water transpired or from plants and that has evaporated from the soil. The cooler temperatures in the atmosphere cause it to condense in the clouds, which float around in the air until they fall from the sky as precipitation. Some precipitation falls as snow and can accumulate as hail, where it can stay, as ice crystals, for thousands of years. In warmer climates, snow melts, then warmer spring and summer months, and that water flows into streams and rivers, which eventually return it to the ocean, or into the groundwater, which eventually reach underground purifiers. Over time, the water continues to flow, some to return to the ocean, where the water cycle renews itself.
Due to the increase in greenhouse gases less solar energy is reflected back into space and more solar radiation is absorbed by the Earth causing the increase in ice and snow melting (Main & Ahlenius, 2011). With this background information the change of climate conditions such as, snow, rain, winds, and temperature is continuously happening all around the world and will continue to worsen in the future. A good indication of climate change is to look at the melting of glaciers and the Polar Regions as the Arctic is one of the fastest warming regions of the world. However, since the Polar Regions are so big and cold it would be impracticable for humans to live and carry out research there. Therefore, by using applications of remote sensing we can easily observe inaccessible areas from satellites to effectively monitor and map snow and ice cover in Polar
Examples of regional metamorphic rocks include schist and gneiss. Thermal metamorphic rocks, also known as contact metamorphic rocks, are formed by extreme heat along with quite a bit of pressure. The pressure pushes the molten rock against the Earth's surface, causing it to recrystallize. Examples of thermal metamorphic rocks are marble and sandstone
Effects of Global Warming on Walruses When people talk about global warming, they think of the polar ice caps being melted and humans causing too much pollution in the air from various activities. It is actually an overall increase in the average temperature of the Earth’s surface caused by gases being trapped in the atmosphere by the “greenhouse effect” . From the North down to the South Pole temperatures are rising and the world is heating up fast. This has caused many changes in the nature of things. One such victim of the change in our climate is a pinniped most commonly known as the walrus.