Of course, think of all the products containing steel, aluminum, and brass. Coal tar is a phototoxic substance which, in the presence of sunlight, can cause a skin reaction similar to an aggravated sunburn, frequently causing blisters. Physical geology is the study of physical processes that occur on earth and the material composition of the earth. In recent times, these physical principles have been used to study other terrestrial planets within our solar system.
Historical geology examines the time evolution of material structures and life on earth.
This examination focuses on layered rock records and fossils. Soil Mechanics is a study of the engineering properties. It is instructive to make a short excursion into discussing the scientific method of investigation. Define a problem or make an observation. Hypothesize a theory to describe or explain observation.