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Geology The study of the origin, history, and structure of the Earth and the process that shape the Earth Oceanography The scientific study of the sea Meteorology Scientific study of the events of the Earth's atmosphere, especially in relation to the weather and climate Astronomy The study of the universe Scientific Method The series of steps scientists use to answer questions and solve problems. Model A pattern, plan, represervation, or description to show the structure or workings of an object, system, or concept Theory An explanation that ties together many hypotheses and observations Physical Model Looks like the object it is supposed to represent Mathematical Model Made up of mathematical equations and data Conceptual Model A mental image of a system, object, or process; some are based on making comparisons with familiar objects to help illustrate or explain an idea Metric System International system of Units (SI) Length Measure of how long an object is (m) Volume Measure of the size of a body or region in 3D space (cm3) Mass Measure of the amount of matter in an object (g) Temperature Measure of how hot or cold something is (C) Density Mass in a given space; mass per unit volume