Convection | Definition, Examples, Types, & Facts | Britannica
网页2024年9月5日 · convection, process by which heat is transferred by movement of a heated fluid such as air or water. Natural convection results from the tendency of most fluids to expand when heated—i.e., to become less dense and to rise as a …
Convection in Science | Definition, Function & Examples
网页2023年11月21日 · The definition of convection in science is the transfer of heat through liquids or gases. Convection is one of three types of heat transfer, along with convection and radiation.
Conduction - Center for Science Education
网页Conduction, radiation, and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. Conduction directly affects air temperature only a few centimeters into the atmosphere.
5.1: Earth’s Interior - Geosciences LibreTexts
网页Heat flows in two different ways within the Earth: conduction and convection. Conduction is defined as the heat transfer that occurs through rapid collisions of atoms, which can only happen if the material is solid.
Convection Currents in Science: Definition and Examples
网页2024年8月14日 · Convection currents are heat-driven cycles that move energy from one location to another. Because particles within a solid are fixed in place, convection currents are seen only in gases and liquids. A temperature difference leads to an energy transfer from an area of higher energy to one of lower energy.
What Are Convection Currents? - Sciencing
网页2018年4月23日 · Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock. The heat transfer function of convection currents drives the earth’s ocean currents, atmospheric weather and geology.
Introduction to Earth Sciences I - Columbia University
网页Convection - a circulatory motion of heated material. Liquids and other weak materials heated in one area (usually from beneath) experience such motion. We all have the common experience of watching water or soup move around in a pot on the stove when we heat it from below. In convection the moving material carries the heat.
Three-Dimensional Spherical Models of Convection in the Earth ... - Science
网页Three-dimensional, spherical models of mantle convection in the earth reveal that upwelling cylindrical plumes and downwelling planar sheets are the primary features of mantle circulation. Thus, subduction zones and descending sheetlike slabs in the mantle are fundamental characteristics of thermal convection in a spherical shell and are not ...
Mantle convection earth and planets | Solid earth geophysics ...
网页Mantle Convection in the Earth and Planets is a comprehensive synthesis of all aspects of mantle convection within the Earth, the terrestrial planets, the Moon, and the Galilean satellites of Jupiter.
A Laboratory Model for Convection in Earth's Core Driven by a ... - Science
网页1999年11月19日 · Thermal convection experiments in a rapidly rotating hemispherical shell suggest a model in which the convection in Earth's liquid outer core is controlled by a thermally heterogeneous mantle. Experiments show that heterogeneous boundary heating induces an eastward flow in the core, which, at a sufficiently large …
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