Ideas for a Grade 7 Science Fair Project
Science fairs are a wonderful opportunity for students to explore areas of personal interest. Physics, chemistry, anatomy and social sciences are just a few of the scientific branches students can explore. Whatever project you choose, be sure it's a topic you'll enjoy spending lots of time working on.
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Testing Graphology
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Graphology claims that a person's personality can be determined by looking at their handwriting, so put that theory to the test with a controlled experiment. First, have ten or more subjects take a standardized personality test, like the Myers-Briggs. Then have each subject submit a handwriting sample for your analysis. Using a graphology text for guidance, compare what your subjects' handwriting allegedly says about their personalities to the Myers-Briggs results. Look for correlations to determine whether or not your experiment supports graphology as a valid science.
Tooth Decay and Soda
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Sodas contain sugars and acids which wear down tooth enamel and promote decay. To determine which sodas do the most damage, put carefully weighed pieces of limestone into samples of soda. After the limestone has remained in the soda overnight, remove it and check its weight again. The amount of weight the limestone loses will correlate to the severity of decay it has undergone. For more data, check the PH level of each soda and use a control glass of limestone and water.
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Eyewitness Reliability
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Eyewitnesses are used every day in court cases, but how reliable are they? Have 20 subjects perform an simple task together, like watching a movie. Then have them interrupted by an actor, who makes a scene and leaves. Ask the subjects for details about the incident immediately after the event and two weeks later. Compare the subjects' recollections to the actual facts of the incident. Use this data to draw conclusions about the reliability of eyewitness testimony.
Taste and Smell
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Determine the relationship between taste and smell by performing an experiment. Have subjects close their eyes and hold their nose, then feed them Life Savers. Time how long it takes them to determine the flavor, if they're able to determine it at all. Then, repeat the experiment without your subjects holding their noses. See how long it takes them to discover the flavor. Compare the results and use them as evidence to determine how smell effects our sense of taste.
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References
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