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Section 1.2 Notes

Section 1.2 Notes. The Way Science Works. EQ?. 1.2 THE WAY SCIENCE WORKS. Science Skills Critical thinking helps you solve problems logically. Scientists use scientific methods to solve problems. Scientists test hypotheses .

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Section 1.2 Notes

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  1. Section 1.2 Notes The Way Science Works

  2. EQ? 1.2 THE WAY SCIENCE WORKS • Science Skills • Critical thinking helps you solve problems logically. • Scientists use scientific methods to solve problems. • Scientists test hypotheses. • Controlled Experiments: Variables that can affect the outcome of the experiment are keptconstant, or controlled, except the one that you want to measure. Only the results of changing the given variables are observed. • Experiments test ideas. • Scientists use special tools. INSERTPICTURE

  3. EQ? 1.2 THE WAY SCIENCE WORKS • Scientific Methods: A general way to help • organize your thinking about questions. • you to find & evaluate possible answers. Observe Formulate a Question (First Time) • Research and Collect Data Form a Hypothesis Test the Hypothesis Observe Draw Conclusions (Second Time) • Research and Collect Data Form a Modified Hypothesis Test the Hypothesis Observe Draw Conclusions INSERTPICTURE

  4. EQ? 1.2 THE WAY SCIENCE WORKS • Units of Measurement • Scientists use standard units of measure that together form the International System of Units (SI). • SI is based on the metric system and uses seven SI base units. • Combining any of the seven SI base unitsgives SI derived units. • SI units are used for consistency. • When all scientists use the same system of measurement, sharing data and results is easier. INSERTPICTURE

  5. EQ? 1.2 THE WAY SCIENCE WORKS • Seven SI Base Units:

  6. EQ? 1.2 THE WAY SCIENCE WORKS • SI Derived Units:

  7. EQ? 1.2 THE WAY SCIENCE WORKS • Units of Measurement • SI prefixes are used for very large an very small measurements. • You can convert between smaller and larger numbers. • Measurements quantify your observations. • Time, length, mass, and volume • Weight: The force with which Earth’s gravity pulls on that quantity of matter. INSERTPICTURE

  8. EQ? 1.2 THE WAY SCIENCE WORKS • Prefixes for Large Measurements:

  9. EQ? 1.2 THE WAY SCIENCE WORKS • Prefixes for Large Measurements:

  10. EQ? 1.2 THE WAY SCIENCE WORKS • Measurements quantify your observations:

  11. EQ? 1.2 THE WAY SCIENCE WORKS • Steps for Fence-Posting: • Write down where you are headed. • Write down where you are starting. • Use units to work through the problem. • Example: Convert 1.85 m to cm. INSERTPICTURE

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