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Color code vocabulary words and definitions  write it down! important ideas and concepts  write it down review and supplementary information  you should.

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Presentation on theme: "Color code vocabulary words and definitions  write it down! important ideas and concepts  write it down review and supplementary information  you should."— Presentation transcript:

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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