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Earth system
unit 10
| Question | Answer |
|---|---|
| Earth system | encompasses the planet's interconnected components—the atmosphere (air), hydrosphere (water), biosphere (life), and geosphere/lithosphere (rocks, soil, and land). |
| geosphere | the solid Earth, including the crust, mantle, and core, as well as all rocks, minerals, and landforms |
| hydrosphere | the combined mass of all the water on, under, and above Earth's surface, including oceans, lakes, rivers, groundwater, and ice. |
| cryosphere | all frozen water on Earth, including snow, ice sheets, glaciers, sea ice, and permafrost. |
| atmosphere | the layer of gases surrounding a celestial body |
| biosphere | the part of Earth, extending into the atmosphere and ocean, where all living organisms exist, and it is often considered the sum of all Earth's ecosystems, or ecosphere. |
| energy budget | a detailed account of the energy that enters, leaves, and remains within a system, like an organism or Earth itself. |
| air pressure | he force exerted by the weight of the air above a surface |
| mesosphere | the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude. |
| stratosphere | the layer of the earth's atmosphere above the troposphere, extending to about 32 miles (50 km) above the earth's surface (the lower boundary of the mesosphere). |
| troposphere | he lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere. |
| ozone layer | a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun. |
| green house effect | the natural process where certain gases in Earth's atmosphere absorb and re-emit infrared radiation (heat) from the Sun, preventing it from escaping directly into space and thus warming the planet. |
| temperature | the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch |
| thermal energy | the total internal energy of a system due to the random motion of its atoms and molecules |
| thermal expansion | the tendency of matter to change its shape, area, or volume in response to changes in temperature. |
| heat | the quality of being hot; high temperature. |
| radiation | energy that moves from one place to another in a form that can be described as waves or particles. |
| convection | a mode of heat transfer that involves the movement of fluids (liquids or gases) where warmer, less dense regions rise and cooler, denser regions sink, creating circulation patterns called convection currents. |
| conduction | the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material. |
| thermosphere | he uppermost layer of the atmosphere, in which temperature increases as altitude increases |
| wind | the movement of air caused by differences in air pressure |
| Coriolis effect | the curving of the path of a moving object from an otherwise straight path due to Earth’s rotation ( |
| global wind | the movement of air over Earth’s surface in patterns that are worldwide |
| jet stream | a narrow band of strong winds that blow in the upper troposphere |
| local wind | the movement of air over short distances; occurs in specific areas as a result of certain geographical features ( |
| ocean current | a movement of ocean water that follows a regular pattern |
| surface current | a horizontal movement of ocean water that is caused by wind and that occurs at or near the ocean’s surface |
| deep current | a stream like movement of ocean water far below the surface |
| convection current | any movement of matter that results from differences in density; may be vertical, circular, or cyclical |
| upwelling | the movement of deep, cold, and nutrient- rich water to the surface |