1 / 57

BELLWORK : 8/16-17/12

BELLWORK : 8/16-17/12. Think of a question that you could answer through an experiment: What is the question? How would you setup the experiment?. Introduction to Science. 1 – The Nature of Science 2 – The Way Science Works 3 – Organizing Data. Online Textbook Access. Go to URL

zank
Télécharger la présentation

BELLWORK : 8/16-17/12

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BELLWORK : 8/16-17/12 Think of a question that you could answer through an experiment: What is the question? How would you setup the experiment?

  2. Introduction to Science 1 – The Nature of Science 2 – The Way Science Works 3 – Organizing Data

  3. Online Textbook Access • Go to URL • http://my.hrw.com • Username • rcsps • Password • rutherford

  4. 1 – The Nature of Science

  5. Key Terms • Science – Knowledge obtained by observing natural events and conditions to learn facts, principles, laws • Technology – Application of science for practical purposes • Law – A descriptive statement or equation that predicts events under certain conditions • Theory – System of ideas explaining related observations and supported by evidence

  6. How Science Takes Place • 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 predictions of current theories • Examples – New materials for computer chips that make processing speeds/phones more advanced

  7. How Science Takes Place • Examples – TVs were built after the early cathode ray tubes were developed in the late 19th century

  8. Scientists Experiment • Answer questions by investigating • Sometimes these are old questions, sometimes new • Often, questions arise from observations • Investigate by designing/conducting experiments • Experimental results are confirmed ( repetition )

  9. Observe

  10. Branches of Science • Natural Science: Biological, Physical, Earth

  11. Working Together • Different branches of science work together, along with technology • Example: Applying newer computer-chip materials into actual designs ( Razr, self-cooled labtops )

  12. Laws & Theories – Always Tested • Laws allow predictions to be made about how a system will behave under given conditions • GRAVITY • Theories explain HOW a process takes place • PLATE TECTONICS

  13. Models • Mathematics is useful to describe events • Gravity has an equation

  14. Models • Models can represent physical events • Used in daily life • Hurricane trajectories • Weather predictions

  15. BELLWORK : 8/20/12 Which popcorn is the better deal?

  16. Last Week • Discussed the fundamental nature of science • Also worked on observation skills • Anyone observe something interesting over the weekend?

  17. Introduction to Science 1 – The Nature of Science 2 – The Way Science Works 3 – Organizing Data

  18. 2 – The Way Science Works

  19. Science Skills • Identifying problems • Planning experiments • Recording observations • Correctly reporting data

  20. Critical Thinking • Involves asking questions, making observations, and using logic • Surprise!!

  21. BELLWORK : 8/20/12 Which popcorn is the better deal? Discuss

  22. Units of Measurement • In your notes, list 5 you can think of. • Do these relate to length, mass, weight, time, volume

  23. Units of Measurement • Scientists use standard units of measure – SI System • Meters, grams, Seconds

  24. Units of Measurement • SI ( System Internationale ) used for consistency • Prefixes allow for easy converting • EXAMPLES: • m  km • kg  g • seconds  milliseconds

  25. Exit Pass – Unit Conversions • Study Guide – Pg 3 • Problem 3 • Remaining Time – Problems 1, 5 & 6

  26. Bellwork – 08/21/12 • Study Guide – Pg 3 • Problem 3 • Finished? – Questions 1, 5 & 6

  27. Help with # 1, pg 3 • Microscopes – magnify ( make larger ) small objects • Telescopes – magnify objects far away • Radio telescope – detect radio waves from objects • Spectroscopes – separate light into a rainbow • Ruler – finds length

  28. Key Terms • Variable – A factor changing in an experiment • Length – Measure of the straight-line distance between two points • Volume – The space occupied by an object • Mass – Amount of matter in an object • Weight – Amount of gravitational force on object

  29. Scientific Method – Use Colors!! • Notice there is more than time where you observe

  30. Are They The Same? • Are they the same? - Hypothesis • How can we test your hypothesis?

  31. Bellwork – 8/23/12 • Study Guide • Finish pg. 3 - #2 , #4

  32. Introduction to Science 1 – The Nature of Science 2 – The Way Science Works 3 – Organizing Data

  33. Presenting Scientific Data • Scientists use written reports and oral presentations • To share results • Organizing/Presenting this info is important

  34. Line Graphs • Show continuous changes • Time : Independent Variable (x-axis) • Doesn’t DEPEND on anything • Gas Volume : Dependent Variable (y-axis) • Depends on something else

  35. Demonstration • Gas-Producing Reaction • Lots of gas at first, then slows down • Adding Vinegar to Baking Soda makes CO2

  36. Bar Graphs • Compares similar data for different items or events

  37. Pie Chart Graphs • Shows parts of a whole ( or parts of 100% )

  38. Lab Activity – Motion Graphing • If we do not take this seriously or respect the equipment, we will not use this setup again

  39. Lab Activity – Motion Graphing • Each group goes to their station • One person logs into network/labtop • Open Logger Pro Software • Open file “01a Graph Matching”

  40. Procedure • Collect data by hitting green “Collect” button • You will hear Motion Detector “clicking” • You will also see data collected an graph

  41. Lab Activities • Turn the detector on and stand still in front of it • What do you see on a distance vs. time graph? • Repeat the test but slowly move away from the detector • What do you see?

  42. Lab Activities • Turn the detector on and move back and forth in front of it ( get far away, move closer ) • What do you see on a distance vs. time graph?

  43. GRADE - Graph • Setup a graph of distance vs time for a person • What would it look like if someone is moving away from these detectors at constant speed? • What type of graph is this ( line, bar, pie chart )?

  44. Bellwork - 08/27/12 • What does it mean to be precise? • QUIZ – Thursday ( 6th ) and Friday

  45. Precision & Accuracy • Precision: the exactness of a measurement • Accuracy: how close a measurement is to the true value

  46. Applying Precision - Accuracy • Scientists use significant figures to show precision of a measured quantity • Significant figure: Prescribed decimal place determining the amount of rounding-off when assessing the precision of a measurement • Round your answers to the correct significant figures

  47. LAB Activity - GRADE • Get 50 points for participation • If I see not participating in one way or the other – less than 50 points • Document on Projector Screen ( 1 / group )

  48. Bellwork - 08/29/12 • Think of the paper-wad toss we did yesterday. Would it be accurate, precise, neither, both in the following situation? • 4 made it in the basket, 1 landed far away • QUIZ – Thursday ( 6th ) and Friday ( 3rd, 5th, 7th )

  49. Significant Figures – Counting Rules • ALL non-zero digits are Significant • Leading and trailing zeros are not significant • 2500 and 0.000036 have TWO Significant Figures • Zeros in between Non-Zeros are significant • 2501 and 2003 have FOUR Significant Figures • Zeros after a decimal point ARE SIGNIFICANT • They do not begin the number • 25.00 and 15.10 have FOUR Significant Figures

  50. Chpt 1 Quiz • Key Terms • Scientific method • Branches of science • Metric conversions • units (length - meters, mass - grams, time - sec) • Types of graphs • Precision and accuracy

More Related