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NOTIFICATIONSTrying to understand how this planet we call home works can seem confusing – there are so many things going on at once! Scientists break down the way the Earth system works to a number of subsystems – the atmosphere, biosphere, geosphere (or lithosphere) and hydrosphere. Before we look at what all these subsystems do, it is important to remember that the subsystems do not work in isolation – each one depends on and interacts with the other three. AtmosphereThe atmosphere is the layer of gases that surround the Earth. In comparison to the size of the Earth, it is a thin layer, composed primarily of nitrogen and oxygen with small amounts of carbon dioxide and other gases. The atmosphere is important for a number of reasons – it protects the Earth from incoming solar rays, it circulates the gases that plants and animals need to survive and it is responsible for our weather. BiosphereThe biosphere consists of all the living organisms on Earth. Their habitats extend from the upper areas of the atmosphere, to deep in the ground, to the bottom of the ocean – any place that life can exist. GeosphereThe geosphere is the physical Earth – the rock, magma and soil. The geosphere extends from the centre of the Earth (the core, mantle and crust) to the dust in the atmosphere and even includes the sediments found in the oceans. HydrosphereThe hydrosphere is all the water held on the Earth – water molecules in the air, icebergs and glaciers, groundwater, lakes, rivers and oceans. How do the subsystems interact?This is a big question, and it would take many books to explain, but think about this example. We know weather happens in the atmosphere, but without the hydrosphere, there would be no water to evaporate and so no cloud or rain could form. Without oceans and land (hydrosphere and geosphere), there would be no wind (as winds are produced by differences of air temperature between the land and oceans). Without the atmosphere (giving us air to breathe and protection from incoming solar rays), there would be no life on Earth. It would be as barren as the moon. Without water, life as we know it would cease to exist. Last of all, without the geosphere, there would be no world to live on! Look at the changing landscape of Earth. Rivers erode the geosphere, changing the physical environment so that plants and animals have to adapt or die. Bad weather might increase the weathering of rocks (the way rocks are broken down) changing both the physical and chemical makeup of the rocks. These are a few examples to show how the systems are interlinked. Upsetting one system can lead to serious consequences in the sustainability of another system. Nature of scienceThis topic shows how science is a way of explaining the world and how scientists work together to do this. In studying this, students will be able ask questions, find evidence and share and examine knowledge. Related contentWould you like to take a short survey?This survey will open in a new tab and you can fill it out after your visit to the site. The teacher understands the structure and function of earth systems. Earth Science describes the structure and composition of earth and how it has changed over time. It is crucial to many aspects of human life and the production of resources. Why Earth Science? Subtopics:
The Structure and Processes of EarthThe beginning teacher understands the structure of Earth and analyzes constructive and destructive processes that produce geologic change. Key Concepts:
Resources:Earth Structure Plate Boundaries Geomagnetism Mechanical and Chemical Weathering Erosion and Weathering Water SourcesThe beginning teacher understands the form and function of underground and subsurface water. Key Concepts:
Resources:Where is Earth’s Water Located? Lakes What is Ground Water? Physical Properties of Rivers Ocean Resources The AtmosphereThe beginning teacher applies knowledge of the composition and structure of the atmosphere and its properties. Key Concepts:
Resources:Earth’s Atmosphere Interactions between SpheresThe beginning teacher demonstrates and understanding of the interactions that occur among the biosphere, geosphere, hydrosphere, and atmosphere. Key Concepts:
Resources:Marsupials
Polar Substorms Ozone Basics Changes in Earth SystemsThe beginning teacher applies knowledge of how human activity and natural processes, both gradual and catastrophic, can alter earth systems. Key Concepts:
Resources:The Global Carbon Cycle Global Climate Change Climate Effects of Volcanic Eruptions Coal Combustion and Acid Rain Earth’s Energy SourcesThe beginning teacher identifies the sources of energy (e.g., solar, geothermal) in earth systems and describes mechanisms of energy transfer (e.g., convection, radiation). Key Concepts:
Resources:Global Energy Balance Understanding Convection Currents What Causes the Tides? What is the main part of the geosphere?The geosphere includes all the rocks that make up Earth, from the partially melted rock under the crust, to ancient, towering mountains, to grains of sand on a beach. Both the geosphere and hydrosphere provide the habitat for the biosphere, a global ecosystem that encompasses all the living things on Earth.
What is geosphere short answer?The geosphere is the earth itself: the rocks, minerals, and landforms of the surface and interior. Below the crust – which varies in depth from about 5 km beneath the ocean floor to up to 70 km below the land surface, temperatures are high enough for deformation and a paste-like flow of elements.
What are five importance of geosphere?Importance of Geosphere
It is the Geosphere that controls the distribution of rocks, minerals, and soils. It also controls the difficult hazards of nature that form the land and create an impact on our life. The different Geospherical actions decide where to place the mountains in the different landforms of the Earth.
What are the 3 main parts of the geosphere?The Geosphere. The Earth's geosphere is divided into three chemical sections:. The crust, composed almost entirely of light elements, like silicon.. The mantle, which is 68% of the Earth's mass.. The core, the innermost layer; it is composed of very dense elements, such as nickel and iron.. |