Physical Science projects study the relationship of factors in fields such as physics, chemistry, astronomy, geology, oceanography, mathematics and meteorology.

Some projects entered as physical science may be more accurately entered as engineering.  For example, experimenting to find "Which Materials Absorb Oil Best?" is only physical science, although there is an implied application in the work, such that it is almost "Which Materials Can Absorb Oil From an Oil Spill?".  Determining the exhibitors intent should help clarify. Comparison testing of products, as it is descriptive, would be included.

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