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THE SCIENTIFIC METHOD

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CHAPTER 1 SCIENCE Science is a system of knowledge based on facts and principles. Biology is the scientific study of all forms of life or all types of organisms. – PowerPoint PPT presentation

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Title: THE SCIENTIFIC METHOD


1
THE SCIENTIFIC METHOD
  • CHAPTER 1

2
SCIENCE
  • Science is a system of knowledge based on facts
    and principles.
  • Biology is the scientific study of all forms of
    life or all types of organisms.

3
THEORIES VS. LAWS
  • Scientific theories are explanations for some
    phenomena based on observation, experimentation,
    and reasoning.
  • Scientific law is a summary of an observed
    natural event.
  • Laws are not the same as theories because laws
    tell only WHAT happens, not WHY it happens.

4
THE SCIENTIFIC METHOD
  • The scientific method is a series of logical
    steps to follow in order to solve problems.

5
THE SCIENTIFIC METHOD
  • Steps of the Scientific Method
  • State the problem
  • Do background research
  • Form a hypothesis
  • Design an investigation
  • Collect data
  • Analyze Data
  • Identify new questions raised by the conclusions
    for further investigation.
  • Communicate results

6
SCIENTIFIC INQUIRY VOCABULARY
  • Inference is the act or process of drawing a
    conclusion based solely on what one already
    knows.
  • An observation is to detect, discover or
    determine the existence, presence, or fact of.
  • A hypothesis is a possible explanation that can
    be tested by observation or experimentation.

7
PARTS OF AN EXPERIMENT
  • The independent variable is the variable that is
    intentionally changed in the experiment.
  • The dependent variable is the variable that
    responds to the changes in the independent
    variable.

8
PARTS OF AN EXPERIMENT
  • The control is the standard against which the
    researcher compares the results from each
    treatment group (level) in the experiment.
  • Constants are the things that are kept the same
    each time one of the trials in the experiment is
    repeated.

9
PARTS OF AN EXPERIMENT
  • Example An effervescent tablet (alka-seltzer)
    releases carbon dioxide when it dissolves in
    liquid. We noticed that the tablet did not
    always dissolve at the same rate. Based on our
    knowledge of dissolving a solid, we wanted to see
    if temperature would have an effect on the rate
    of dissolving.
  • What would our hypothesis be?
  • What would our independent variable be?
  • What would our control be?
  • What are some constants in this experiment?
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