i have test tomorrow could u guys help me to get good answer??
2006-10-23 21:24:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Geography
Basically the mantle is divided into 2 parts: the upper mantle (connected to the crust = the lithosphere) and the lower mantle (asthenosphere). The upper mantle tends to be both cooler and more solid; the lower mantle hotter and more plastic. Hot melted rock rises from the lower mantle, cools, gets mixed with materials from the crust, especially at subduction zones, and sinks again. Convection is the process of rising and falling due to heat differences, so you could say the convection process is occuring at some point throughout the whole mantle.
Check out the website below for some good info & graphics...
and don't wait so late before asking your question! I hope you see this before your test! Good luck!
2006-10-24 02:37:07 · answer #1 · answered by peter_lobell 5 · 0⤊ 0⤋
????
covecting is curving so the center is above the rim eg a convect mirror, sometimes called a bubble mirror
2006-10-24 04:37:55 · answer #2 · answered by exchange 3 · 0⤊ 1⤋
you always have test tomorrow...
2006-10-24 15:24:26 · answer #3 · answered by Some Guy 2 · 1⤊ 0⤋