In archaeology, the word has become a term of particular nuance and is defined as an object recovered by archaeological endeavor, which may be a cultural artifact having cultural interest. Artifact is the general term used in archaeology, while in museums the equivalent general term is normally 'object', and in art history perhaps artwork or a more specific term such as 'carving'. The same item may be called all or any of these in different contexts, and more specific terms will be used when talking about individual objects, or groups of similar ones. Artifacts exist in many different forms and can sometimes be confused with ecofacts and features; all three of these can sometimes be found together at archaeological sites. They can also exist in different types of context depending on the processes that have acted on them over time. A wide variety of analyses take place to analyze artifacts and provide information on them. However, the process of analyzing artifacts through scientific archaeology can be hindered by the looting and collecting of artifacts, which sparks ethical debate. Examples include stone tools, pottery vessels, metal objects such as weapons and items of personal adornment such as buttons, jewelry and clothing. Bones that show signs of human modification are also examples. Natural objects, such as fire cracked rocks from a hearth or plant material used for food, are classified by archaeologists as ecofacts rather than as artefacts. Artefacts exist as a result of behavioural and transformational processes. A behavioural process involves acquiring raw materials, manufacturing these for a specific purpose and then discarding after use. Transformational processes begin at the end of behavioural processes; this is when the artefact is changed by nature and/or humans after it has been deposited. Both of these processes are significant factors in evaluating the context of an artefact. Artefacts, features and ecofacts can all be located together at sites. Sites may include different arrangements of the three; some might include all of them while others might only include one or two. Sites can have clear boundaries in the form of walls and moats, but this is not always the case. Sites can be distinguished through categories, such as location and past functions. How artefacts exist at these sites can provide archaeological insight. An example of this would be utilising the position and depth of buried artefacts to determine a chronological timeline for past occurrences at the site.