Is there a difference with sheets(1) and worksheets(1)?

Will Name = worksheets(1) (or sheet(1)) give me the name assigned to the
worksheet?

Is the order of the worksheets the same as the displayed order when the
workbook is open?

Want to activate and work on first 16 worksheets which plop values into
the last two worksheets. I'm using:

For n = 1 to 16
Sheets(n).select
rada, rada, rada
Next

It doesn't seem to be working

thanks
John