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SCIENTIFIC METHOD

SCIENTIFIC METHOD. The scientific method is a series of steps and a thought process used to solve problems. Scientific Method is used every day by all sorts of people…not just scientists! There are 6 steps to completion of the scientific method. Step #1. 1. Purpose

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SCIENTIFIC METHOD

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  1. SCIENTIFIC METHOD • The scientific method is a series of steps and a thought process used to solve problems. • Scientific Method is used every day by all sorts of people…not just scientists! • There are 6 steps to completion of the scientific method.

  2. Step #1. • 1. Purpose • - What do you want to learn?? What is the problem? • This may begin with asking a question. • Ex: What is the disease-causing agent?

  3. Step #2. • 2. Research/Collecting Data. • Observing • Measuring • Sampling • Organizing data

  4. Step #3. • 3. Hypothesis • An educated guess • CAN BE TESTED!!! • Can be supported or not supported….never true or false. • Written in the “if-then” form.

  5. Examples of “If-then” form • If detergents were to be tested, then ERA would clean the best. • If mice are subjected to microwaves, then they will have a shorter life span. • If the virus were the true disease-causing agent, then introducing the virus into healthy tissue would cause cell death.

  6. Step #4. • 4. Experiment • Process of testing hypothesis by gathering data under controlled conditions

  7. Parts of an experiment • Variables = things that change • Independent variable - manipulated by the experimenter. • Example…amount of dog food • Dependent variable-it is dependent on the independent variable. It RESPONDS to the experiment. • Example…weight of dog

  8. Parts of experiment continued… • Control - What you compare to….a standard. • Constant - Something that never changes. Variables should be the only thing that is different…everything else should be held constant! • Theory = suggested EXPLANATION.

  9. Step #5. • 5. Analysis • Collecting and organizing data from the experiment • Graphs • Models

  10. Step #6 • 6. Conclusion • Stating whether the hypothesis was supported or not supported • Sum up the experiment

  11. GRAPHING • There are rules & guidelines to graphing. • You must always title your graph. • You must always label the x & y axis including the measurements! • The independent variable always goes on the x-axis. • The dependent variable always goes on the y-axis. • You must always mark the #’s in equal step intervals. • Make straight/accurate lines. Be neat!

  12. GOOD BAD

  13. We will be making LINE graphs. You will plot the points and then connect them with a straight line.

  14. LINE graph = find the relationship between two variables. BAR = show a # PIE = show % When making a graph, make sure you use all available space and make the line take up the size of the graph. Go to the following link for some exapmles: http://www.mste.uiuc.edu/courses/ci330ms/youtsey/lineinfo.html

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