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Earth Science Chapter 2


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Name three qualities of scientific thinking.
observant, methodical, inventive, creative, skeptical, cooperative.
Describe the scientific inquiry approach to answering questions.
ask questions
form hypothesis
gather data
test the hypothesis
share what is learned
Explain the difference between a hypothesis and a theory
A theory is a hypothesis that has been tested over and over and "proved" to be true (no exceptions have yet been found).
Explain the difference between a theory and a law. (The reason objects fall down is because the earth's gravity draws them to it.)
A theory explains how or why something happens or happened; a law doesn't explain, it describes what will always happen under certain conditions (if dropped, an object will always fall toward the earth).
What tools do scientists use to study the Earth and oceans?
math and technology:
satellites, computers, GIS systems (geographic information systems)and other complex instruments as well as simple instruments like lenses, crushers
Dr.Harrington, who teaches at Harvard Medical school, observed BLS students daily from his nearby office. He noticed that a great many were obese and wanted to find out why. He thought about several possibilities: unhealthy school lunches and snack machi
observing and asking questions
Dr. Harrington guessed that students who participated in sports would be less obese than those who did not. What stage is this called?
forming a hypothesis
Dr. Harrington designed an anonymous survey to hand out to students that asked about their participation in sports, their eating habits at school and at home, and whether their parents were overweight. What is this phase?
designing an experiment to test the hypothesis
Dr.Harrington got permission to hand the survey out in all homerooms at Boston Latin. What aspect of the scientific method is this?
gathering data
He input the results of the surveys to his computer and was able to form a profile for each student that showed How many obese students had overweight parents, how many bought snacks and ate the school lunch, how many participated in sports, etc. He foun
analyzing data and drawing conclusions
Dr. Harrington published his experiment in the Journal of New England Medicine. Why?
He needed to share his results with colleagues so they could repeat his experiment and test whether his results are accurate or not.

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