Key to designing successful experiments is the identification of all variables relevant to both the observed phenomenon and the question posed. Next a model is proposed to explain the data collected in the experiment. The model might be based on known scientific laws and theories, and can be physical, conceptual, analytical or pictorial. The proposed model is compared carefully with the experimental data to check the model's validity. The model may need to be modified or the experiment altered many times before an acceptable match of the model with the actual phenomenon is achieved.
Physical science pertains to the study of natural phenomena associated with non-living objects.
Physical science encompasses all sciences except the life sciences, and includes astronomy, chemistry, geology and physics. In the physical sciences we study the properties of matter and the interactions among non-living objects. Here we will not distinguish among the different kinds of physical sciences since the scientific laws and theories apply to all. The laws and theories created by scientists during the past 300 years weave the fabric of physical science which applies to all phenomena in nature. Scientists have found that nature has an inherent, elegant order.