Yes, all of those can be found in Excel.
There are different names: Workbooks or Spreadsheets or Worksheets. Workbooks contain worksheets, and they can be called spreadsheets. They will have a .xls extension.
workbooks
A workbook in Excel is a collection of worksheets, which may be what you mean. There is no particular name for a collection of workbooks. They are just workbooks or spreadsheet files.
Yes they can.
Worksheets do not have extensions. They are contained in files known as workbooks. A 2007 workbook extension is .xlsx.
Excel is a spreadsheet application. It can have charts and worksheets in it.
Either *docs or docx depending on which version (year) of office you use.
A workbook in Excel is a collection of worksheets, which may be what you mean. There is no particular name for a collection of workbooks. They are just workbooks or spreadsheet files.
What are some application for excel workbooks and worksheets in both the field of accounting and for an NFL team
The standard extension for Excel workbooks is xls for versions up to 2003. Excel 2007 uses xlsx as its extension for workbooks.
Worksheets are stored in a workbook in Excel.
No workbooks are open when you first install excel. The first time you use excel, you will have one workbook open.