CHEM120 Chapter Notes - Chapter 1: Chemical Element, Significant Figures, Distillation

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Hypothesis: is a tentative explanation of a natural law. Theory: is a model or way of looking at nature that can be used to explain natural laws and make further predictions about natural phenomena. Scientific method: is the combination of observation, experimentation and formulation of laws hypotheses and theories. Matter: is anything that occupies space and displays the properties of mass and inertia. All the objects that we see around us consist of matter, even gases since they have mass. Sunlight however is not matter because it is a form of energy. Composition: refers to the parts or components of a sample of mater and their relative proportions. Properties: are those qualities or attributes that we can use to distinguish one sample of matter form others. Physical property: is one that a sample of matter displays without changing its composition.