Did u know that our planet, Earth wasn’t always thought of as a planet? Until the sixteenth century when Capernicus figured out that the Earth was another planet, which revolved around the sun, Greek astronomers thought the Earth was the center of the solar system. Also Earth is the only planet that its name didn’t come from Greek/Roman mythology.
When earth was first discovered, astronomers were only able to study it with out spacecraft. It was not until the twentieth century that we had maps of the entire planet. Pictures taken of the planet are very important, not only because they aid in weather predictions, but they are also very beautiful.
The Earth is divided into seven layers: the crust, upper mantle, transition region, lower mantle, D” layer, outer core, and inner core. “The crust varies considerably in thickness; it is thinner under the oceans, and thicker under the continents”. (Arnett1) The inner core and crust are solid, and the outer core and mantel layers are plastic or semi-fluid. Most of Earth’s mass is in its mantle and the rest is in its core.
Most of the core is made of iron, but there may be lighter elements in it too. Temperatures at the center of the core can be as high as 7500K, which is hotter than the surface of the sun.
“Unlike the other rocky planets, Earth’s crust is divided into several separate plates, which float around inde...
3. Identify the layers of the Earth shown in the diagram to the right. (S6E5a)
Earthquakes are a natural part of the Earth’s evolution. Scientific evidence leads many geologists to believe that all of the land on Earth was at one point in time connected. Because of plate tectonic movements or earthquakes, continental drift occurred separating the one massive piece of land in to the seven major continents today. Further evidence supports this theory, starting with the Mid-Atlantic ridge, a large mass of plate tectonics, which are increasing the size of the Atlantic Ocean while shrinking the Pacific. Some scientists believe that the major plate moveme...
The earth is split into four layers, inner and outer core, the mantle and crust. The top of the mantle and crust make up what is like the skin of our earth (see source 2). The skin is split up like a puzzle and we call these puzzle pieces’ tectonic plates (see source 1). These plates are constantly moving and the plate boundaries (edges of the plates) move and slide past one another. Sometimes as the plates move the plate boundaries become stuck. Pressure builds up in the stuck area over time and eventually breaks. This is why earthquakes occur due to the sudden movement of the plate sliding and breaking creating a fault line to go off. The fault line is the line on which the
and Metamorphic rocks can be found. There are also a lot of crusted plates, and violent
About 20 million years ago the last part of the Farallon sea floor plate subducted under the North American plate. This put the North American plate and the Pacific plate into contact, but unlike the Farallon sea floor plate, the Pacific plate sheared against the side of the North American plate. Because there was no plate subducting, the North American plate was in direct contact with the mantle (Tierney, 29). Heat from the mantle made the continental crust more ductile, which allowed the crust to extend and thin.
Knowledge of the internal structure section of the earth's crust and the outer part of the Earth's atmosphere; because the lava issued from this level, a depth of about 450 kilometers.
The earth’s surface and the mantle make up the composition of the tectonic plates. This layer, called the lithosphere, rests on top of the asthenosphere, a layer of molten rock. The asthenosphere is constantly moving and flowing due to the extreme pressures...
The mantle of the Earth is very weak so, the rigid structures of the lithosphere move around easily. Tectonic plates move easily over the mantle because, they are just floating there. The heat of the Earth causes the magma in the liquid mantle to expand and move. The heating and moving of magma causes the tectonic plates to move. The plates move in a pattern called a
Core/Interior: The Earth has three layers to it's interior, the inner core, outer core, and mantle. Of these the outer core is thought to be liquid. Like most of the terrestrial planets at birth, the Earth has been molten and undergone some differentiation allowing the heavy material which is consisting mostly of an iron, nickel, and cobalt core making it's density five and a half times the density of water.
The layer underneath the crust is the mantle, which is made up mainly of ferro-magnesium silicates. The mantle is approximately two thousand, nine hundred kilometers thick, and is separated in to the upper and lower mantle. It is in the mantle where most of the centralized...
our solar system, but they are unimportant compared to the nine major planets. In this paper I will discuss the planets and how they are each unique.
Earth was formed 4.8 billion years ago (3) . It became the home for hazelnuts because it had an atmosphere and environment which allowed for life to prosper in later years. Earth’s surface was once composed of a single landmass, known as Pangaea (1).Over time it was broken up into seven different plates which were free to move as a result of movements in the hot, semi-liquid magma beneath the...
The field of geology has many different branches. Some of these areas have hardly anything in common. The one thing that they all include, though, is that each one concentrates on some part of the Earth, its makeup, or that of other planets. Mineralogy, the study of minerals above the Earth and in its crust, is different from Petrology, the st...
Earth system refers to the earths interacting physical, biological, and chemical processes. The system consists of land, oceans, atmosphere and poles. The earth system has four spheres, including the geosphere, the hydrosphere, the atmosphere, and the biosphere. The geosphere refers to the solid parts of the earth system, including earth’s rocky crust, mantle, and the metallic core. Within the geosphere is the lithosphere, which only refers to the uppermost layers of solid earth. The uppermost layers of solid earth are the oceanic and continental crust rocks. Just below the crust is the mantle, which is composed mostly of magnesium and iron silicate minerals. The mantle accounts for about 2/3 of the
The lithosphere is an open system, which contains all of the cold, hard, solid rock of the planet's crust (surface), the hot semi-solid rock that lies underneath the crust, the hot liquid rock near the center of the planet, and the solid iron core (center) of the planet (Answers.com). On Earth, the lithosphere comprises the crust and the upper part of the mantle. The lithosphere is about sixty miles thick (Lenkeit).