THE ENDLESS BOOKCASE FOR AUTHORS
Authors often have problems with this.
Beware that if you paste an image into Word and then subsequently do a Save As the images in the new file will typically have much lower resolution.
Changing settings in Word might not help although it’s worth doing. click here for details.
The problem arises because Word creates its own version of an image that is pasted in.
The answer is to use Insert to put your original image into Word.