When you unlock iPad it should open to the Home Screen or the last opened app.
If you don't want it to open to Amazon, exit out of amazon once you are done with it by swiping up from the bottom of the screen..
If it opens to the Amazon app and you want to use a different app, do the same thing, swipe up from the bottom of the screen to close out Amazon and select a different app. For a Google search that app would be Safari or whatever other web browser app you may have installed.
In Sfari, you can type in the address bar and search on Google.com on whatever search engine you have selected for it.
If you happen to be accessing Amazon.com in the Safari App, you can open a new tab by tapping on the + button at the top right corner and then typing your search in the address bar.
click here ➜ Search for websites using Safari on iPad - Apple Support
