how does cycling of matter occur in earths mantle?
Thanks pepz. And living meme we are not dumbos. Stop being so mean.
http://www.answers.com/Q/How_does_cycling_of_matter_occur_in_earths_mantle
Yes A, thank you my dudes.
OK I UNDERSTAND NOW THANK YOUUUUUUUU!!!!!
Keep you nonsense to yourself living meme!
You had it set to M for Miniature when it should have been set to W for Wumbo
ok you say its a but do you mean
hot,soft rock rises from the bottom of the mantle toward the top, cools, and sinks back through the mantle
???
The cycling of matter in Earth's mantle occurs through a process known as mantle convection. Let me explain how this works.
1. Mantle Composition: The Earth's mantle is primarily composed of solid rock, mainly silicate minerals like olivine and pyroxene. However, despite being solid, the mantle is capable of flowing slowly over long periods of time due to its high temperature and pressure.
2. Convection: The mantle convection is driven by heat transfer from the Earth's core, which generates heat through radioactive decay and residual heat from the planet's formation. This heat transfer causes the mantle material to become less dense and rise toward the surface in convection cells, similar to the movement of hot air in a room.
3. Upwelling and Downwelling: As the mantle material rises, it cools and eventually reaches the surface, forming volcanic activity or mid-oceanic ridges. This process is known as an upwelling. As the mantle material cools and becomes more dense, it descends back down into the mantle in a process called downwelling or subduction. Subduction occurs primarily at convergent plate boundaries where one tectonic plate is forced beneath another.
4. Recycling of Materials: During subduction, as the denser oceanic crust sinks into the mantle, it carries along with it various rocks and minerals. This process leads to the recycling of the Earth's crustal material back into the mantle. Over time, these recycled materials can be melted and brought back to the surface through volcanic activity or other processes, completing the cycle.
In summary, cycling of matter in Earth's mantle occurs through mantle convection, where heat transfer drives the movement of mantle material in upwelling and downwelling flows. This process leads to the recycling of crustal materials, influencing volcanic activity and contributing to the formation of Earth's dynamic surface.
it's A.
study next time, dumbo.