Biology 10 Laboratory

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Biology 10 Laboratory

• Ms. Nancy Wheat

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Important Information

• Instructor Ms. Nancy Wheat
• nwheat_at_hartnell.edu
• Lab book Biology 10 Laboratory Manual
• Visionlearning www.visionlearning.com
• Register as a student.
• Join Hartnell College BIO 10 General Biology
  MyClassroom.

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Scientific Method

• One of the goals of science is to answer
  questions about how the world works.
• Scientific explanations are based on natural laws
  and are testable.
• The scientific method illustrates the way in
  which science is done.

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Scientific Method
Observations

• This simplified flow diagram of the scientific
  method shows the important components involved in
  a scientific study.

Hypothesis
Conclusion
Experiment/ Observations
Scientific Theory
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Scientific Method

• First is the observation phase, where new
  observations are made.
• This is also the time where previous data are
  examined.
• Next, a hypothesis is formulated to attempt to
  explain the available data and observations.
• A hypothesis must be testable!!!

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Scientific Method

• The hypothesis is then tested through a series of
  experiments and/or observations.
• These experiments and observations must be
  repeatable!
• The factual information resulting from these
  experiments and observations is called data.

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Scientific Method

• An important part of an experiment is the
  control, which is a replicate set up exactly like
  the experiment, except it does not have the
  factor being tested.
• It is important to repeat an experiment exactly
  the same way many times.
• Replicates

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Scientific Method

• Independent variable the variable that you
  manipulate.
• Example size of a food item.
• Dependent variable the variable that you will
  measure.
• Example how long it takes to eat that food
  item.

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Scientific Method

• Scientists can then draw a conclusion based on
  the data.
• The conclusion may involve accepting or rejecting
  the initial hypothesis.
• Further experiments may require an adjustment to
  the conclusions.
• Hypotheses are said to be supported, but not
  proven.

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Scientific Method

• New hypotheses are generated from the
  conclusions, and the process starts again.

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Scientific Method

• A theory results when a group of related
  hypotheses are supported by many experiments and
  observations.
• Theories are the ideas that scientists are MOST
  SURE OF!
• Theory of gravity
• Theory of evolution

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Scientific Method

• The previous model is very simplified and the
  result is too linear.
• The activity model for the process of
  scientific inquiry shows the more complex
  interactions that are really involved.

Harwood, W. S. 2004. A new Model for Inquiry is
the Scientific Method Dead? Journal of College
Science Teaching. 33(7) 29-33.