Search results
Results From The WOW.Com Content Network
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 ...
The best example is a sea breeze. Convection occurs when the Earth is heated unevenly. The air over the Earth will heat according to how fast the Earth under it heats. That part of the atmosphere that heats faster will expand. This relationship between heat and volume is Charles Law. Since the volume increases the pressure will drop. This is due to the fact that air masses do not readily mix ...
Both the ocean and atmosphere have rising air/water and cooling air/water. In the atmosphere, as the air gets warmer, it rises up. When the air gets cooler, it sinks down. Same goes for oceans. When the water gets warmer due to either sunshine or geothermic properties, it rises up as surface currents which have their own unique pathway. This opposes the Earth's air because they have no direct ...
Explanation: 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. The heated material will rise to the top.
Convection currents are the simple rising of hot matter and the sinking of cooler matter. Explanation: These convection currents push against the tectonic plates causing them to move.
Convection currents is related to plate tectonics because it explains the reason why plate tectonics move. For instance, some geologists believe that the main factor for the motion of plate tectonics is convection currents that occurs in the mantle. This is because the mantle is made of semi-molten rock called magma. In addition, just as convection currents occurs in a boiling pan this same ...
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.
It is one of the 3 main types of heat transfer. Its a process which involves the movement of the energy from one place to another. It can only happen in the fluids and tends to move a fluid or gas particles from one place to the other. It helps in the transfer of the heat. These are created due to the differences occurring within the temperature and densities of a specific gas or a fluid.
Explanation: Convections currents in the earth's mantle are thought to be the driving force of plate tectonics. Where the hot magma is brought near the surface by the convection currents a divergent boundary is created. The divergent boundaries form new oceans and widen existing oceans. They also form volcanos, islands and undersea mountain ranges.
The theory of plate tectonics suggests that the lithospheric plates move because of convection currents in the semi molten mantle. Convection currents can be observed on the surface of a hot liquid. If there are minerals in the liquid that can solidify as they cool, the minerals are observed to form plate like structures. In the middle of the liquid there is an up current as the heated liquid ...