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Physical Science Unit 1

Physical Science Unit 1

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Physical Science Unit 1

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  1. Physical Science Unit 1 Physical Science Basics

  2. Science Terms • Pure Science: studying the world or learning new things about it • Ex. finding a new plant • Technology, or applied science: using science to improve someone’s life • Ex. Using plants to make medicine

  3. Branches of Science • Life Science: study of living things…biology • Earth Science: study of Earth formations and how we “fit” in the universe • Physical Science: study of matter and energy • Matter: anything that has mass and takes up space • Any solid, liquid, or gas • Energy: the ability to cause change • Motion, sound, light, heat

  4. The Scientific Method • the way scientists collect information and test ideas • Problem/Question • Observations • Gather information • Hypothesis • Proposed solution (testable) • Experiment • Test with organized procedure • Record and Analyze Data • Conclusion • Answer question from step 1 • Repeat

  5. Law vs. Theory • Scientific Law: describes something's behavior and has been proven by many experiments • Ex. When you release an object into the air, it falls to the ground • Scientific Theory: explains WHY something behaves the way it does • Ex. The object falls to the ground becauseof Earth’s gravity

  6. Good Experiment has several parts: • Control: something to compare your results to • Constants: parts that do not change • Independent Variable: part that the scientist changes • Dependent Variable: part that changes because of the independent variable

  7. Example • Ms. Rhoney wants to find out which bug spray works best: Off, Avon, or Cutter. Four students help her. These are her results: • Group 1 (OFF): 4 mosquito bites • Group 2 (Avon): 18 mosquito bites • Group 3 (Cutter): 10 mosquito bites • Group 4 (none): 28 mosquito bites

  8. What should be the control? (How do we know the sprays work at all?) • What should have been kept constant? • What is the independent variable? (what did she change each time?) • What is the dependent variable? (what changed because of the type of spray used?) • What should be her conclusion?

  9. Graph of Bug Spray Data # of bug bites

  10. Graphing • A Graph is a visual display of data

  11. Circle Graph Circle Graphs, or pie graphs show how something is broken down into parts.(usually %)

  12. Bar Graph • Bar Graphs show information that has been counted. # M&M’s

  13. Line Graphs • Line Graphs are used to show trends of how data changes over time. The Independent Variable is on the x-axis and the Dependent Variable is on the y-axis. Temperature C Time (minutes)

  14. Interpolate and Extrapolate: