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Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
Chapter 1 notes
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Chapter 1 notes

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  • 1. CHAPTER 1 NOTES “ BIOLOGY AND YOU”
  • 2. I. Biology – study of life.
  • 3. II. Organism – any living thing.
  • 4. III. CHARACTERISTICS OF LIFE
  • 5. <ul><li>All living things are made of cells </li></ul><ul><li>2. All living things grow and develop . </li></ul><ul><li>3. All living things obtain and use energy to run life processes . (metabolism) </li></ul><ul><li>4. All living things respond to changes in their external environment. a. Homeostasis – maintenance of stable internal environment by the cells. </li></ul><ul><li>5. All living things can reproduce . </li></ul>
  • 6. IV. BIOLOGY IN YOUR WORLD
  • 7. 1. Scientists are using biology to help solve the problems of today. <ul><li>Preserving our environment. </li></ul>
  • 8. Improving the food supply
  • 9. Understanding the human genome
  • 10. Fighting diseases such as cancer, AIDS, and genetic diseases.
  • 11. V. SCIENTIFIC PROCESSES
  • 12. <ul><li>Observation is the basis for scientific research. </li></ul><ul><li>2. Stages of the scientific method: </li></ul><ul><li>a. Observing the world around you </li></ul><ul><li>b. Asking questions </li></ul><ul><li>c. Propose a hypothesis – a possible explanation for a problem. </li></ul><ul><li>d. Perform an experiment , a planned procedure to test a hypothesis. </li></ul><ul><li>e. Draw a conclusion that supports or rejects the hypothesis </li></ul>
  • 13. <ul><li>Parts of an experiment: (Ex: see if plants grow better if they are given fertilizer) </li></ul><ul><li>a. Control group – the group in the experiment that receives no experimental treatment. (one plant that gets no fertilizer) </li></ul><ul><li>b. Experimental group – the group in the experiment that receives some type of experimental treatment. (one plant that gets the fertilizer.) </li></ul><ul><li>1. independent variable – factor that is changed in an experiment. (fertilizer) </li></ul><ul><li>2. dependent variable – variable that is measured in an experiment. (height of the plant) </li></ul>
  • 14. <ul><li>4. Theory – formed when repeated experiments confirm a hypothesis over and over again. </li></ul><ul><li>A theory unites and explains a broad range of observations. </li></ul>

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