P2.3 Scientific Models
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P2.3 Scientific Models

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P2.3 Scientific Models P2.3 Scientific Models Presentation Transcript

  • Warmup  How is an airplane flight simulator a kind of model?  What are some advantages to training pilots in a flight simulator rather than in a real airplane?
  • Objectives: 1. Explain how models are used to represent the natural world. 2. Identify three types of scientific models. 3. Describe theories and laws.
  • Types of Models  Model  A representation of an object or a system. 1. Physical Models ○ look like the thing they represent ○ For example, the model volcano looks like a real one but won’t destroy acres of forests.
  • 2. Mathematical Models ○ Made up of mathematical equations and data. 3. Conceptual Models ○ Systems of ideas or are based on making comparisons with familiar things to explain an idea.  Explains the origin of the universe
  • Models are just the right size  Often used to represent things that are very small or very large.  Useful for studying cells and particles of matter that are too small to see with the unaided eye.  Also useful for studying objects that are too large to see completely  such as the Earth or the solar system.
  • Models build scientific knowledge  Often used to help illustrate and explain scientific theories.  Theory ○ Explanation that ties a broad range of hypotheses and observations that have been supported by testing. ○ Can also be used to predict what will happen in future  Theories and models can change as new observations are made. Charles Darwin’s Theory of Evolution 1897 Model of Atom Current Model of Atom
  •  Scientific Laws  Formed when a theory and its models correctly predict the results of many different experiments.  Law is defined as:  A summary of many experimental results and observations.  Laws are not the same as theories. Laws tell you only what happens, not why it happens.