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Experimental Design and Graphing
Terms in this set (20)
The variable that is changed in the experiment.
Independent Variable (IV)
The variable that is measured in the experiment.
Dependent Variable (DV)
All of the possible things that could affect the results of the experiment.
The variables that we keep the same (hold constant) so that they do not change during the experiment.
An educated guess of the results of the experiment.
To think about the data and observations recorded during an experiment to make sense of the results.
Summary of the results of an experiment using data to support your claim.
Specific step-by-step instructions for how to conduct an experiment.
Conduct a controlled test to answer a specific question.
An organized way to answer an experimental question.
The standard against which the researcher compares the results from each level of treatment.
What is a control?
These are observations that describe "qualities" of something. These would include characteristics such as texture, color, shape, and do not involve counting or measuring.
Describe a qualitative observation.
involve counting or measuring using standard scales. This would include such
things as mass, volume, time, temperature, frequency of occurrence, etc.
Describe a quantitative observation.
A scientifically accepted, well-supported explanation of some aspect of the natural world that is acquired using a scientific method and repeatedly tested and confirmed through observation and experimentation. [Examines what happens and tells us how and why it happens.]
What is a theory?
A descriptive statement based on repeated experimental observations that describes some aspect of the universe. A scientific law always applies under the same conditions, and implies that there is a causal relationship involving its elements. [Tells us what happens.]
What is a law?
A conclusion that is formed on the basis of evidence and reasoning.
Predicting values that are within the range of available data (between existing data points)
Predicting values that are outside the range of available data; a trend line is often extended to make it easier (outside the range of existing data points).
As the Independent Variable (I.V) goes up so does the Dependent Variable (D.V.) and vice versa.
As the Independent Variable (I.V.) goes up the Dependent Variable (D.V.) goes down and vice versa.
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