What generates the heat necessary for convection in the Earth group of answer choices?
Focus Question: What is the source of energy for convection currents in the geosphere? Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere.
What causes convection on Earth?
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
What is the heat source for convection in Earth’s mantle?
The primary sources of thermal energy for mantle convection are three: (1) internal heating due to the decay of the radioactive isotopes of uranium, thorium, and potassium; (2) the long-term secular cooling of the earth; and (3) heat from the core.
How is the Earth heated through convection?
Convection happens in a liquid or a gas. Air near the ground is warmed by heat radiating from Earth's surface. The warm air is less dense, so it rises. As it rises, it cools.
What is convection of the Earth?
The main heat transfer mechanism in the Earth's mantle is convection, a thermally driven process where heating at depth causes material to expand and become less dense, causing it to rise while being replaced by complimentary cool material that sinks.
What is required for convection?
It relies on the collision of particles within or between substances. It occurs in solids, liquids, or gases that are heated. It results when portions of a liquid cool and rise. It is driven by temperature differences within a fluid.
What is convection of the earth?
The main heat transfer mechanism in the Earth's mantle is convection, a thermally driven process where heating at depth causes material to expand and become less dense, causing it to rise while being replaced by complimentary cool material that sinks.
What is heating by convection?
Heat convection is the transfer of thermal energy by the physical movement of fluid (liquid, gas, or plasma) from one location to another. Heat convection is often the primary mode of energy transfer in liquids and gases. Along with conduction and radiation, convection is one of three basic methods of heat transfer.
How does conduction heat the Earth?
Energy (heat) is transferred between the Earth's surface and the atmosphere by radiation, conduction, and convection. items do not heat up rapidly when heat is applied to them, making them poor conductors. Water, wood, and some plastics are examples of poor or moderate conductors.
What is convection in Earth science?
The term convection generally refers to the movement of fluids, meaning liquids and gases, but in the earth sciences, convection also can be used to describe processes that occur in the solid earth. This geologic convection, as it is known, drives the plate movement that is one of the key aspects of plate tectonics.
How does convection occur in the atmosphere?
Convection happens because warm air is less dense than the cold air around it, so it is lighter and rises or goes up in the atmosphere. Evidence of convection happening is seen with the formation and growth of cumulus clouds.
What is the process of convection?
Convection is the process by which heat is transferred from a solid surface to a nonsolid, such as air or water. The convection process involves the motion of the fluid relative to the solid surface and the processes by which heat is transferred across the interface.
Where does heat transfer occur in a convection process?
Convection. Convective heat transfer is the transfer of heat between two bodies by currents of moving gas or fluid. In free convection, air or water moves away from the heated body as the warm air or water rises and is replaced by a cooler parcel of air or water.
What does convective heat transfer depend on?
The convective heat transfer coefficient h strongly depends on the fluid properties and roughness of the solid surface, and the type of the fluid flow (laminar or turbulent).
Where does convection heat transfer occur?
Heat convection occurs only in liquids and gases, or in mixtures of both. In forced convection, the heat transport is generated by means of an external source. For example, it is well-known that a hot plate of metal will cool faster when exposed to a blowing fan than when exposed to still air.
What is necessary for convection to occur in a substance?
It relies on the collision of particles within or between substances. It occurs in solids, liquids, or gases that are heated. It results when portions of a liquid cool and rise. It is driven by temperature differences within a fluid.
What does convection mean in the earth?
The main heat transfer mechanism in the Earth's mantle is convection, a thermally driven process where heating at depth causes material to expand and become less dense, causing it to rise while being replaced by complimentary cool material that sinks.