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color code

color code. vocabulary words and definitions write it down! important ideas and concepts write it down review and supplementary information you should know most of this, I wouldn’t write down a lot

vaughan
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color code

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  1. color code • vocabulary words and definitions • write it down! • important ideas and concepts • write it down • review and supplementary information • you should know most of this, I wouldn’t write down a lot FYI – all presentations (notes) reviewed in class will be available on the school website by the weekend.

  2. how science happens… • scientists… • investigate • experiment • A scientist may perform experiments to find a new aspect of the natural world, to explain a known phenomenon, to check the results of other experiments, or to test the predictions of current theories. • observe • test

  3. how do we organize science? • Science has many branches

  4. branches of science (cont) • natural science is divided into life science, physical science and earth science

  5. but… what is science? • science • the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested • pure science is the continuing search for scientific knowledge • practical science is what we call technology • the application of science for practical purposes

  6. scientific laws & theories • law • a descriptive statement or equation that reliably predicts events under certain conditions • theory • a system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation • laws tell you what happened • theories tell you why it happened

  7. scientific laws & theories (cont) • experimental results should support laws and theories • if they don’t, the law or theory may need to be modified • for this reason scientific theories are always being questioned and examined • to be valid, a theory must: • explain observations • be repeatable • be predictable

  8. scientific laws & theories (cont) • laws and theories can be stated in two ways • qualitative statement • describes something with words • quantitative statement • describes something with mathematical equations • For example: Newton’s Second Law • A body of mass m subject to a force undergoes an acceleration that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass. • F = ma, force = mass x acceleration

  9. using models in science… • model • a representation of an object or event that can be studied to understand the real object or event • scientists use models to study objects and events that are… • too big • too small • examples: • conceptual model of the atom (WAYYY too tiny to study) • computer models of the universe (WAYYY too big to study)

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