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Chapters 1 BIOLOGY

Chapters 1 BIOLOGY. Hamilton High School Science Department Mr. Sears . What is SCIENCE ???. The knowledge of what we believe to be true AND the techniques and procedures used in seeking that knowledge. Truth in Science is proven by experimentation . ..

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Chapters 1 BIOLOGY

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  1. Chapters 1 BIOLOGY Hamilton High School Science Department Mr. Sears

  2. What is SCIENCE ??? • The knowledge of what we believe to be true AND the techniques and procedures used in seeking that knowledge. • Truth in Science is proven by experimentation... • Pure Science – discovery for knowledge alone. • Applied Science (Technology)- Using science knowledge to improve the human condition. • PHILOSOPHY studies ETERNAL TRUTHS….

  3. Divisions of Science • Chemistry – The study of chemical reactions • Physics – The study of forces in nature. • Biology - The study of life. • The future health of our planet and our species depends upon our understanding of biology, chemistry, and physics!

  4. All living things share SEVEN common characteristics:PROPERTIES OF LIFE • 1. They are organized into units calledCELLS. • 2. They are capable of REPRODUCTION. • 3. They change during their lives. (GROWTH AND DEVELOPMENT) • 4. They adjust to their surroundings. • ( RESPONSIVENESS)

  5. 5. Obtain and use ENERGY..called METABOLISM • 6. Maintaining a chemical balance calledHOMEOSTASIS. • 7. Pass on traits using genes • HEREDITY • Anything that possesses all of the characteristics of life is known as an organism.

  6. Themes of BIOLOGY • Evolution -The diversity of life today is a result of a long history of change through mutation and adaptation. • Interdependence - All life forms are dependent on each other for survival within the ecosystem.

  7. Living Things Adjust To Their Surroundings How doesheredity, metabolism and homeostasis relate to these organisms?

  8. Tools of Science…. • Scientific Method- experimenting • Metric System….based on the number 10. • meter –length….kilo, meter, centi, milli • liter – volume….kilo, liter, milli • gram – mass……kilo, gram, milli • temperature – Celsius 0 to 100 degrees

  9. The Scientific Method A step-by-step process used to solve problems.

  10. 1. State the problem ( in the form of a question). 2. Research information 3. Form the hypothesis and prediction 4. Test- Experiment Control group Experimental group 5.Identify independent and dependent variable 6. Record and Analyze your data. 7. Draw a conclusion about the validity of your hypothesis. Steps In The Scientific Method

  11. The Parts of An Experiment • Experiment - testing a hypothesis by collecting information under controlled conditions. • Two groups: • 1. Control - all conditions are kept the same. • 2. Experimental - all conditions are kept the same except the single one that’s being tested.

  12. The Parts of An Experiment • In a controlled experiment, only one condition is changed at a time. • The condition that is changed is called the independent variable. • The condition that results from changing the independent variable is known as the dependent variable.

  13. An Example of an Independent Variable • In an experiment designed to test the effectiveness of a flea powder, the amount of flea powder applied to dogs would be an example of an independent variable.

  14. An Example of a Dependent Variable • The number of fleas detected on each dog over the next few days, weeks, or months would be the dependent variable in this experiment.

  15. The Development of Theories • A hypothesis that is supported by many separate experiments over a long period of time is known as a theory. • Examples: • - Theory of Evolution • - Big Bang Theory

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