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convection currents occur when a heated fluid expands, becoming less dense, and rises. The fluid then cools and contracts, becoming more dense, and sinks. Convection currents are an important form of heat transfer. Convection occurs when heat cannot efficiently be transferred through radiation or thermal conduction. In astronomy convection currents occur in the mantle of the Earth, and ...
Convection is relocation/circulation for stability, under conditions of different temperature and pressure, and density and viscosity.. Despite highs like Himalayas and Rocky Mountains, and lows like Mariana Trench in Pacific, the global surface is equipotential geoid and the gravity is normal to the mean surface level.. Yet, densities of minerals in the mantle differ, The same matter might ...
The currents take place in the core and the mantle. In the Convection Currents in the Mantle. Heat in the mantle is brought about from the Earth's molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates. Conclusively, the Convection currents is created due to heated fluid expansion and ...
AI-generated answer. The convection currents in the mantle are primarily caused by the process of mantle convection. This process is driven by the heat generated from the Earth's core, which creates a temperature difference between the lower and upper regions of the mantle. Here is a step-by-step explanation of how this process works: 1.
Convection currents (as you should know) are formed from nuclear processes in the core of the earth that release great amount of thermal energy, this energy takes the form of a 'convection current' within the semi-solid mantle, which heats part of the mantle, which causes it to expand and rise, much like how convection currents in water work ...
Explanation: Convection currents happen in fluids with a heat source. Hot liquid or gas near the heat source becomes hotter and less dense, so moves upwards. This forces the cooler stuff at the top to move back down. As the hot molecules move up, they cool down and begin to drop. As the cool molecules move down, they heat up and begin to rise.
Due to the immobile nature of solid particles, a convection current only occurs in gases and liquids. Energy is transferred from areas of higher energy to areas of lower energy as a result of the difference in temperature. What causes convection currents in earth's mantle? The effect of differential heating is convection currents. Material that ...
A. Magma in the mantle is being heated by the hot core, causing it to rise toward the crust, then sink as it cools, the convection circuit pulling the tectonic plates. B. Water in the mantle is being heated by the hot crust, which causes it to sink toward the core where it cools, the convection circuit pulling the tectonic plates. C.
The movement of tectonic plates on Earth's surface is primarily driven by convection currents in the mantle. These currents are generated by heat from the Earth's core, which causes hotter, less dense material to rise, while cooler, denser material sinks. As a result, these currents create a dynamic environment that facilitates the movement of ...
Magma in the lower mantle is heated by the core and rises toward the crust. It then cools and sinks back down toward the core. Convection currents occur when a reservoir of fluid is heated at the bottom, and allowed to cool at the top.. Heat causes the fluid to expand, decreasing its density. If there is cooler material on top, it will be more compact and therefore, will sink to the bottom ...