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Intro to Physical Science (Grade 8: Class B ONLY)


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Powerpoint for Class "B" to study. CLASS "A" YOU DO NOT NEED TO STUDY THIS!

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Intro to Physical Science (Grade 8: Class B ONLY)

  1. 1. What is Science? Science is a systematic way of learning about the natural world There are 3 main branches of science: ◦ Life Science ◦ Earth Science ◦ Physical Science
  2. 2. What is Physical Science?  Physical Science is the study of matter and energy, and the changes they undergo ◦ Matter is anything that has mass and takes up space  Mass = the amount of matter an object contains ◦ Energy is the ability to do work  Physical science has two branches: ◦ Chemistry ◦ Physics
  3. 3. What is Physical Science? Chemistry = the study of the properties of matter and the changes they undergo Physics = the study of matter and energy and how they interact
  4. 4. How Scientists Think… They use skills of observation to learn more about the natural world.
  5. 5. Observation Observing = using one or more senses to gather information Two Types: ◦Quantitative observation ◦ Qualitative observation
  6. 6.  Quantitative observations use numbers ◦ Example: measuring your height or weight  Qualitative observations describe what you see; don’t involve numbers ◦ Example: Noticing that a ball is round or that it is raining outside
  7. 7. Look at this animal speed chart: What are some observations you can make?
  8. 8. The Scientific Method  Definition: ◦ A logical, stepwise approach used by scientists to find answers to questions.  Steps: ◦ 1. Observation: Observations are made by scientists about their surrounding environment. The observations allow scientists to ask questions. ◦ 2. State the Problem: The problem statement is in the form of a question. It is derived from the observations made by the scientist.
  9. 9. The Scientific Method ◦ 3. Form a Hypothesis: A hypothesis (an educated guess) is a possible explanation for the observation or problem.  A hypothesis must be tested to determine its validity. ◦ 4. Conduct an Experiment: An experiment tests your hypothesis. ◦ 5. Analyze Data: Data (information gathered from the experiment) must be accurately recorded. Data can be displayed in a graph, chart, or table.
  10. 10. How to Display Data Graph Chart
  11. 11. How to Display Data Table
  12. 12. The Scientific Method ◦ 6. Form a Conclusion: Based upon the experimental results, conclusions can be made about the validity, or correctness, of your hypothesis.  After many experiments that give the same results, a scientific theory may be formed.
  13. 13. The Scientific Method  A scientific theory is a well-tested, verified hypothesis that fits existing data and explains how natural processes or events are thought to occur.  It is a basis for predicting future events or discoveries. Theories may be modified as new information is gained. (Think back to your puzzle activity!)