[android-developers] Process in Android

Hi,

I have an application which has one activity. The application is
launched. When i say back, OnDestory() would be called. This means
that the activity is being killed.

What will happen to the process? Will the process also be killed? But
when i use ps command i could see the process still running.

Will the process not be killed?
Can someone explain this in detail or provide from reference to get
information on the same.

Regards