Scientific Method

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Chapter 1
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Scientific Method

• Scientific method
• a logical, orderly way to solve a problem

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Stages of a scientific investigation

• Observe/State Problem
• using senses (direct or indirect)
• Form a hypothesis
• a proposed explanation that might be true
• (based on observations)
• Ifthen
• Make prediction
• what you expect to happen if a hypothesis is
  accurate

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Stages of a scientific investigation

• Verify prediction
• quick test of hypothesis
• Perform controlled experiment
• variable part of the experiment being
  tested
• control part of the experiment that stays
  the same
• Record/Analyze data
• using charts, graphs

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Stages of a scientific investigation

• Draw conclusion
• yes or no to your hypothesis and why
• Repeat experiment
• to verify conclusion
• Form theory
• hypothesis that withstands experimentation

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Chapter 1

• Biology
• the study of living things

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Characteristics of Life

• Cellular organization
• unicellular one celled
• multicellular - gt 1 cell
• Reproduction
• asexual one organism creates another
• identical copy
• sexual involves sex cells (gametes)

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Characteristics of Life

• Metabolism
• sum total of chemical reactions in the body
• anabolism putting compounds together
• catabolism breaking down compounds
• Heredity
• have DNA pass it on to offspring
• Homeostasis
• maintaining a constant internal balance

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• stimulus
• anything that causes an organism to react
• response
• reaction to a stimulus