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Published byColin Cross Modified over 8 years ago
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What is Science? Review This slide show will present a question, followed by a slide with an acceptable answer. For some questions, there is a definite correct answer. For other questions, several answers may be correct.
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What is SCIENCE? There are several correct answers to this question; list as many as you can.
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A way to answer questions & solve problems How we understand the world around us A way or process used to investigate what is happening around you It provides possible answers What is SCIENCE?
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We answer scientific questions & solve problems with 2 types of research. What are the two types?
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We answer scientific questions and solve problems with 2 types of research. What are the two types? 1.Descriptive Research 2.Experimental Research
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Describe DESCRIPTIVE RESEARCH
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Based mainly on Observations Used when experiments are impossible to perform Involves the following: –Stating the research objective –Describing the research design –Eliminating bias Describe DESCRIPTIVE RESEARCH
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Describe EXPERIMENTAL RESEARCH
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Experimental research includes investigations that: Have variables Test hypotheses May have a control or control group Is a set of planned steps Tests one variable at a time
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How do scientists OBSERVE?
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Using the 5 senses: Hearing Touch Smell Sight Taste
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Define HYPOTHESIS
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A statement that can be tested by conducting an experiment Prior knowledge, new information, observations can be used to form a hypothesis
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Describe VARIABLE
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A part of an investigation that can be CHANGED
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List the 3 TYPES OF VARIABLES
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1.Independent Variable 2.Dependent Variable 3.Controlled Variable
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Explain INDEPENDENT VARIABLE
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The variable that can be changed during an experiment The variable that the scientists chooses to change The variable that may cause a change in the dependent variable
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Explain DEPENDENT VARIABLE
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The factor that is being measured in an experiment The variable that is measured by scientists The variable that may change because of the independent variable
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Explain CONTROLLED VARIABLE (CONSTANT)
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Variable that stays the same during an experiment Variable that is controlled by the scientist Variable that is not allowed to change
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Explain how to RECORD DATA
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Data Tables A way to record results and observations accurately Have a descriptive title Divided into columns & rows Shows the independent variable Provides a place to record the dependent variable Explain how to RECORD DATA
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Describe how to ANALYZE DATA
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Reduce the data with the best measure of central tendency Graph the data Look for patterns and relations Look at the shape of the graph Describe how to ANALYZE DATA
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What do scientists do when they DRAW CONCLUSIONS?
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Answer the original question State whether or not the hypothesis was supported (it is never “right” or “wrong”) Pose questions for further research
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How do scientists COMMUNICATE the results of their work?
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Reported in scientific journals Science journals Presentations to other scientists How do scientists COMMUNICATE the results of their work?
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Why are REPEATED TRIALS necessary in an experiment?
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To make sure results are valid The more trials conducted, the more likely the results are reliable To make sure a “fluke” is not considered the true result
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Why do scientists use MODELS?
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To save time and money when testing ideas that are Very large Very small Dangerous Time-consuming
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