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Section 3 The Study of Biology

Section 3 The Study of Biology. Chapter 1. Objectives. Outline the main steps in the scientific method. Summarize how observations are used to form hypotheses. List the elements of a controlled experiment. Describe how scientists use data to draw conclusions.

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Section 3 The Study of Biology

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  1. Section 3 The Study of Biology Chapter 1 Objectives • Outlinethe main steps in the scientific method. • Summarizehow observations are used to form hypotheses. • Listthe elements of a controlled experiment. • Describehow scientists use data to draw conclusions. • Comparea scientific hypothesis and a scientific theory. • Statehow communication in science helps prevent dishonesty and bias.

  2. Section 3 The Study of Biology Chapter 1 Scientific Processes: DR. HERC • Define the problem • Research the topic • Hypothesize & make predictions • Experiment to confirm or disaffirm your hypothesis and predictions • Record data from your experiment • Conclude your problem

  3. Section 3 The Study of Biology Chapter 1 Scientific Method Click below to watch the Visual Concept. Visual Concept

  4. Section 3 The Study of Biology Chapter 1 Observing and Asking Questions • The process of science begins with an observation. • An observation is the act of perceiving a natural occurrence that causes someone to define a problem.

  5. Section 3 The Study of Biology Chapter 1 Forming a Hypothesis • A hypothesis is a proposed explanation for the way a particular aspect of the natural world functions. • Predicting • To test a hypothesis, scientists make a prediction that logically follows from the hypothesis.

  6. Section 3 The Study of Biology Chapter 1 Designing an Experiment • Performing the Experiment • A controlled experiment compares an experimental group and a control group and only has one variable.

  7. Section 3 The Study of Biology Chapter 1 Controlled Experiment and Variable Click below to watch the Visual Concept. Visual Concept

  8. Section 3 The Study of Biology Chapter 1 Designing an Experiment, continued • Performing the Experiment • The control group provides a normal standard against which the biologist can compare results of the experimental group. • The experimental group is identical to the control group except for one factor.

  9. Section 3 The Study of Biology Chapter 1 Designing an Experiment, continued • Performing the Experiment • The experimenter manipulates theindependent variable. • The experimenter measures the dependent variable because it is is affected by the independent variable.

  10. Section 3 The Study of Biology Chapter 1 Independent and Dependent Variables Click below to watch the Visual Concept. Visual Concept

  11. Section 3 The Study of Biology Chapter 1 Collecting and Analyzing Data • Analyzing and Comparing Data • Scientists analyze data to draw conclusions about the experiment performed.

  12. Section 3 The Study of Biology Chapter 1 Drawing Conclusions • Making Inferences • An inference is a conclusion made on the basis of facts and previous knowledge rather than on direct observations.

  13. Section 3 The Study of Biology Chapter 1 Constructing a Theory • A theory is a set of related hypotheses confirmed to be true many times, and it can explain a great amount of data.

  14. Section 3 The Study of Biology Chapter 1 Honesty and Bias • Communication between scientists about their methods and results helps prevent dishonesty and bias in science.

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