land formed by a river`s deposition of eroded soil and others materials

Answer 1

http://en.wikipedia.org/wiki/Main_Page

http://www.google.com

By now you should be able to look up these answers yourself -- either in one of the sites above or in your textbook.

Please repost when you get the answer, and someone here will give you feedback.

=)

Answer 2

what is weathering