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Methods of Scientists

Methods of Scientists. Section 1.2. The Nature of Scientific Investigation. Scientific method – a series of problem solving procedures that help scientists conduct experiments Hypothesis – a testable explanation of a situation that can be supported or disproved by careful procedures.

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Methods of Scientists

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  1. Methods of Scientists Section 1.2

  2. The Nature of Scientific Investigation • Scientific method – a series of problem solving procedures that help scientists conduct experiments • Hypothesis – a testable explanation of a situation that can be supported or disproved by careful procedures

  3. Experimentation • Experiment – a procedure that involves making observations and measurements to test a hypothesis • Independent variable - the factor changed by the experimenter • Dependent variable – a factor that is affected by changes in the independent variable • Control – used to show that results are a result of the condition being tested

  4. Investigation • How does an experiment and an investigation differ? • Investigations do not involve a control

  5. Analysis and Conclusions • What is bias? • Data can be displayed using graphs, tables, or charts • What happens when a conclusion does not support the hypothesis?

  6. Measurement • Experiments and investigations involve taking measurements • Measurements include a number and units • The standard system of units used by scientists are called SI units • SI units are based on a decimal system that uses the number 10 as the base unit

  7. SI Units • Write the correct SI unit for each of the following: • Length • Mass • Area • Volume • Density • Time • Temperature

  8. Mass vs. Weight • How does mass and weight differ? • Weight depends upon gravity • Your mass on the moon and mass on Earth are the same. However, your weight would differ.

  9. Scientific Notation • Use scientific notation to express the following: • Speed of light: 299,792,458 m/s • Mass of an electron: 0.000000000000000000000000000000911 kg

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