* Microscope is a noun. It refers to the instrument used to magnify small objects.

* Microscopic is an adjective. It describes something that is extremely small, often too small to be seen with the naked eye.

Here are some examples:

* Microscope: "I used a microscope to examine the cells."

* Microscopic: "The bacteria were microscopic and invisible without a microscope."

Essentially, a microscope is the tool, while microscopic describes the size of something.