Objections to the consideration of the question . This can only be used before debate has started. It is used if a member does not want the assembly to address the question because it is off topic or likely to cause trouble. It is not to be used to cut off debate. There are other ways to do that.
Amendments are changes in motions.
There are two kinds of amendments. Primary amendments must be germane to the motion they amend, and may be amended themselves. Secondary amendments apply to primary amendments and must be germane to the primary amendment. Secomdary amendments cannot be amended. Amendments can entirely replace a motion with another motion related to the same subject.