Imagine that you are given a hammer, a small bottle of weak acid, and a piece of limestone about the size of a small, fat dog. Your instructions are to provide a demonstration of the difference between physical and chemical weathering processes. Describe your demonstration.

1) Take the hammer and smash the rock

2) Put acid on the rock

Explanation:

Physical weathering crush a rock's physical structure changing its appearance by friction or impact, therefore, to provide a demonstration of this principle I would take the hammer and smash the rock changing its appearance with the impacts    In contrast, chemical weathering occurs when a chemical reaction of any kind alters a rock's chemical composition changing its appearance through erosion and degradation, therefore, to contrast this phenomenon with the physical weathering I would put acid on the rock to demonstrate the chemical degradation

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Nation of conflicting ethnic groups