Physical Science Notes Chapter 1: The Nature of Science Chapter 1, Section 1 I. How do Scientists explore the world? A. Scientists: ______________________________________ ______________________________________ ______________________________________ ______________________________________ B. Branches of Science (List and Define the Three main branches and give examples of each 1. 2. 3. 4. Define TECHNOLOGY: C. Scientific Laws and Theories 1. Theories explain ________________________________________. Why might a scientific theory be changed? 2. Laws describe __________________________________________. Give an example: Section 2: The Way Science Works I. Science Skills A. Define SCIENTIFIC METHOD List the steps of the Scientific Method B. List some tools (p. 17) that scientists use II. Units of Measurement A. What is SI? Why do scientists use SI? (2 answers – pg. 18) COPY THE TABLES ON PAGE 18 (FIG. 5-7) – for fig. 5 only do length, mass, time and add volume from pg. 20 chart! B. Converting K H D M d c m C. Describe the difference between weight and mass. Section 3 I. Presenting scientific data: line graph, pie graph, bar graph II. Scientific Notation: To reduce very small or very large numbers to simple numbers multiplied by a power of 10 (ten). Practice examples: III. Significant Figures are used to show ____________________________________. A. Accuracy is: B. Precision is Section: Organizing Data 1. Convert the following measurements from scientific notation to long form: __________________________ a. 2.54 10–3 cm __________________________ b. 9.5 104 km __________________________ c. 3.3 10–1 L __________________________ d. 7.445 102 g 2. Convert the following measurements to scientific notation: __________________________ a. 325 kg __________________________ b. 0.00046 m __________________________ c. 7,104 km __________________________ d. 0.0028 L 3. Find the number of significant digits in each of the following: __________________________ a. 0.00326 __________________________ b. 39,010 __________________________ c. 77,900.1 __________________________ d. 1.5300 5. Explain how measurements can be precise but not accurate. ______________________________________________________________________________ ______________________________________________________________________________