Steps to insert an Excel spreadsheet as an appendix in a Word Document:

1. Open both the Word Document and the Excel spreadsheet that you want to insert.
2. In the Excel spreadsheet, select the cells that you want to insert into the Word Document.
3. Right-click on the selected cells and choose "Copy" or press "Ctrl+C" on your keyboard.
4. Switch to the Word Document and place your cursor where you want to insert the Excel spreadsheet.
5. Right-click and choose "Paste" or press "Ctrl+V" on your keyboard.
6. A pop-up window will appear asking you how you want to paste the Excel data. Choose "Microsoft Office Excel Worksheet Object" and click "OK".
7. The Excel spreadsheet will now be inserted into your Word Document as an object. You can resize it by clicking and dragging the corners, and you can also double-click on it to edit the data in Excel.

That's it! You have successfully inserted an Excel spreadsheet as an appendix in your Word Document. Let me know if you have any other questions or if there's anything else I can help you with.