I need a modle of the mid-ocean ridge.?

Labeling the magma, ridge, rift, lithosphere, and asthenosphere.

You mean you need to make one or draw and label a diagram?
Below are some links to diagrams:
http://www.pacificislandtravel.com/nature_gallery/platetectonics2.gif

http://www.earthbyte.org/Training/Ainley_deLeon_Power/mor.gif

http://www.geo.lsa.umich.edu/~crlb/COURSES/270/Lec8/ridgecross.jpeg