You can look at your applications tab in task manager to get a generic idea of what's running. Processes will help some since they're more detailed. Do you mean is it normal for it to jump around? Yes, a cpu is basically on or off. Rapidly flipping the switch to on/off is essentially what you're seeing as it processes data. The less it has to process the lower the usage, when something larger needs processed it will spike as needed then drop back down again. Those things happen within fractions of a second so it's pretty normal.
Edit: That image link didn't work. Check next to the image in imgur and there should be a shortened url they've created like 'image link', 'direct link' etc. Copy and paste that one.