Ppt science u1 lesson 3 (types of investigation)

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Ppt science u1 lesson 3 (types of investigation)

  1. 1. Unit 1 Lesson 3 What Are Some Types of Investigations? Copyright © Houghton Mifflin Harcourt Publishing Company
  2. 2. A Process for Science Copyright © Houghton Mifflin Harcourt Publishing Company Start with a Question • A scientific investigation always begins with a question. • Scientists observe the world and then ask questions based on their observations. Unit 1 Lesson 3 What Are Some Types of Investigations?
  3. 3. Plan an Investigation • Scientific methods are ways that scientists perform investigations. • Investigations can be planned once a scientist has a testable question. • There are many different scientific methods for investigating the world. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations?
  4. 4. Investigations Differ • The method a scientist uses to conduct an investigation depends on the question being investigated. • An investigation in which all of the conditions are controlled is called an experiment. • Models are used to represent real objects or processes, and repeated observations are used to study processes in nature without disturbing them. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations?
  5. 5. Drawing Conclusions • Whatever scientific methods are used, scientists will have results they can use to draw conclusions. • Conclusions can answer the question scientists asked before they began. • Conclusions may also point to other questions and provide ideas for more investigations. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations?
  6. 6. Unit 1 Lesson 3 What Are Some Types of Investigations? Explosive Observations Copyright © Houghton Mifflin Harcourt Publishing Company • Some science questions are too big, too far away, or too uncontrollable for experiments. • Repeated observations can help answer these questions and can help predict future events.
  7. 7. Unit 1 Lesson 3 What Are Some Types of Investigations? Explosive Observations Copyright © Houghton Mifflin Harcourt Publishing Company • How do scientists predict the locations of future volcanic eruptions?
  8. 8. Super Models Copyright © Houghton Mifflin Harcourt Publishing Company When Modeling Is Needed • Scientists use models when they cannot experiment with the real thing. • Scientists draw conclusions and make predictions by studying their models. Unit 1 Lesson 3 What Are Some Types of Investigations?
  9. 9. Super Models Copyright © Houghton Mifflin Harcourt Publishing Company Types of Models • Physical models simulate a real object or event. • Computer simulation models show future or past events. • Drawing diagrams and flow charts show how ideas are related. Unit 1 Lesson 3 What Are Some Types of Investigations?
  10. 10. How to Excel in Experimentation Copyright © Houghton Mifflin Harcourt Publishing Company Ask Questions • Scientific questions can be answered by doing experiments. An experiment tests a hypothesis. • Make observations before stating a hypothesis. Unit 1 Lesson 3 What Are Some Types of Investigations?
  11. 11. Hypothesize • A hypothesis is a statement that can be tested and explains what can happen in an investigation. • You can form a hypothesis by thinking about what you already know, talking to other people, and doing research. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations? How to Excel in Experimentation
  12. 12. Design an Experiment • Experiments can have two or more setups for comparing results. • Variables are any conditions in an experiment that can be changed. Most experiments have many variables, but only one is tested. • The control is the setup to which all other setups will be compared. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations? How to Excel in Experimentation
  13. 13. Carry Out the Procedure • A procedure is the steps scientists follow in an experiment. • Procedures are often repeated. • Repeating procedures gives scientists more evidence to support their conclusions. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations? How to Excel in Experimentation
  14. 14. Record and Analyze Data • Recording data correctly is important. There are many ways to record data. • Once data are recorded, you can analyze the results to draw conclusions. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations? How to Excel in Experimentation
  15. 15. Draw Conclusions and Evaluate the Hypothesis • All conclusions must be supported with evidence in order to have a stronger conclusion. • Once you’ve reached a conclusion, evaluate your hypothesis to determine if it is supported. • Scientists build on what they learn by rethinking their hypothesis or designing new experiments. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 1 Lesson 3 What Are Some Types of Investigations? How to Excel in Experimentation
  16. 16. Unit 1 Lesson 3 What Are Some Types of Investigations? Special Delivery: Data Displays Copyright © Houghton Mifflin Harcourt Publishing Company • Line graphs show change over time. • Circle graphs compare parts to the whole.
  17. 17. Unit 1 Lesson 3 What Are Some Types of Investigations? Special Delivery: Data Displays Copyright © Houghton Mifflin Harcourt Publishing Company • Diagrams show data that do not include numbers. • Bar graphs compare things or groups of things.

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