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Ch. 1: Science in our World!

Ch. 1: Science in our World!. Science!. Question Everything!. Science and Scientists. Science- the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested Investigation Research Observation

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Ch. 1: Science in our World!

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  1. Ch. 1: Science in our World!

  2. Science! Question Everything!

  3. Science and Scientists • Science-the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested • Investigation • Research • Observation • Experimentation • Benefits of science! • Recycling (Saving resources) • Fighting diseases • Answering questions

  4. Jobs in science! • Zoologist • Geochemist • Mechanic • Oceanographer • Volcanologist • Any job ever!

  5. Scientific Method • Scientific Method-a series of steps followed to solve problems • Ask a question • Make observations • Form a hypothesis • Hypothesis-an explanation that is based on prior scientific research or observations and that can be tested • Test the Hypothesis • Analyze the results • Draw Conclusions • Communicate results

  6. Experimenting! • Controlled experiments! • an experiment that tests only one factor at a time by using a comparison of a control group with an experimental group • Variable • a factor that changes in an experiment in order to test a hypothesis • Change only ONE at a time! • Analyzing results of experiments help scientists focus on the effect of the varriable

  7. Scientific Models • Types of Models • Physical • Mathematical • conceptual • Ideas, comparisons, behavior • Model- a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept

  8. Benefit Of Models • Knowledge can change when a scientist makes a new Hypothesis • Models can represent things that do not exist, is to small to see, or to see a large item scaled down • Models can help us understand things • Theory-an explanation that ties together many hypotheses and observations • Law-A summary of many experimental results and observations: a law tells us how things work • New evidence can always challenge accepted ideas and scientists can re-evaluate old ideas

  9. Limits of models • Models are useful but not perfect • A model is not the object it is representing! • A model only tells part of the story • This model shows us what a dinosaur might look like, but that’s it!

  10. Engineering Design Process • Engineering Design Process -the process engineers use to develop a new technology • Step 1- Identify a need • Step 2- Develop possible solutions • Step 3- Make a prototype • Prototype- a test model of a product • Step 4- Testing and Evaluation • Cost benefit analysis- the process of determining whether the cost of doing something is worth the benefit provided • Step 5 - Improve! Repeat forever!

  11. Types of engineering • Intended Benefits vs. Unintended consequences • Bioengineering • Engineering on living organisms • Assistive Bioengineering • Helps, not permanent • Adaptive Bioengineering • Permanently changes individual

  12. Measurement • SI Units- Easy to use, most widely used, and makes information sharing easy

  13. Tools

  14. Safety

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