Commonly asked questions about Anthropology and Archaeology. A great reference page for answering a variety of questions that pertain to the fields.

What is archaeology?
Archaeology is the excavation and study of the material remains left by past communities. Material remains include the physical things people made or used, everything from clothes to buildings. Archaeology can be divided into many specialized subfields, often dealing with a particular time period, culture, geographical area, or category of materials. Please refer to the section under Introduction to Archaeology for a more detailed discussion.

Do archaeologists study dinosaurs?
No. Archaeologists are concerned only with the material remains left by human communities. Currently these extend back to around 4 million years ago. Dinosaurs became extinct around 65 million years ago. Dinosaurs are typically studied by specially trained scientists known as paleontologists, who are experts in identifying the remains of dinosaurs and other animals that lived at the same time.

What is an artifact?
An artifact is any object that was created, modified, or even just used by a human being. It can be difficult to tell if a natural object, such as a stone, was used by a human being unless there are physical marks on it; however, its context will give us clues. Generally, the term artifact is applied to portable objects. Structures created or modified by humans that cannot easily be moved, such as buildings, walls, agricultural terraces, pits, and post holes, are called features. Please refer to our Glossary for more archaeological terms and definitions.

Many more questions/answers in the link.
[archaeological.org]