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BELL RINGER

Discover the fascinating world of chemistry and its three major categories - life science, earth science, and physical science. Learn about the scientific method, investigations, and the importance of understanding chemistry in understanding nature.

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BELL RINGER

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  1. BELL RINGER • What is Biochemistry (In other words what do you think they study)? • What is Environmental Chemistry? • What is Nuclear Chemistry?

  2. Chemistry(IPC) Intro to chem

  3. Video https://www.youtube.com/watch?v=izeuGr0lbN0

  4. What is Chemistry?

  5. What is Science? • Science is the method used to study the natural world • Scientists ask questions and make observations to learn about the rules that govern the natural world

  6. 3 Major Categories of Science 1. Life Science - living things 2. Earth Science – earth and space 3. Physical Science – matter and energy

  7. Which Category is Chemistry? • Chemistry is a physical science • It is the study of: - what matter is made of (composition) -how it combines together (reactions) -things you can learn about it through using your senses (properties)

  8. Investigations • Scientists learn new information about the natural world through investigations: - Can be just observations - Can be experiments

  9. Why Study Chemistry? • Understanding chemistry allows us to understand nature through observations and experiments

  10. Scientific Method • Scientific Method: -The organized process scientists go through when doing research/conducting an experiment.

  11. Scientific Method State the Problem Gather Information Form a Hypothesis Test Hypothesis: Conduct Experiments Analyze Data Accept Reject Conclusions & Theories Reform Hypothesis

  12. State the Problem • State what you are going to investigate/ want to test • Maybe something you wonder why or how it happens

  13. Gather Information • Getting a background from other studies to help form a hypothesis • Researching what is already known about the problem

  14. Form a Hypothesis • A Hypothesis is atestable explanation for a problem using what you know and observe • Example: At least six hours of sleep will improve your grade on tests.

  15. Test a Hypothesis • 3 common ways to test the hypothesis: 1. Observations 2. Make a model of the real-life situation 3. Perform an experiment

  16. Experiment • Experiment: tests the hypothesis using the effect of one variable on another using a control - Carefully planned and setup - Test one variable at a time

  17. Variables • A quantity or condition that can have more than one value - independent: variable that will change - dependent: value changes in response to a change in the independent variable • Cause and effect

  18. Control • Control: A standard that does not change during the experiment - Nothing is added to it or taken away from it - Compare to the independent and dependent variables (before and after the experiment)

  19. Analyze & Collect Data • Organizing and summarizing the data from the experiment • Look for trends • Does it support your hypothesis?

  20. Conclusion • Your judgment based upon your findings • Doesn’t prove your hypothesis, only indicates it might be true!

  21. Science Terminology • Scientific Theory-an explanation of things or events based on knowledge gained from many observations and investigations • May be revised or replaced as time progresses and scientists gather more information • Heavily supported by evidence: experiment repeated many times, results always support hypothesis, so hypothesis called a theory

  22. Scientific Terminology • Scientific Law- a statement about what happens in nature that seems to be true all the time. • Used to make predictions but does not explain why something happens

  23. Law and Theory Related • A theory can be used to explain a law, but theories DO NOT become laws!!

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