Exam 1: Understanding Earth: A Dynamic and Evolving Planet

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How is a theory formulated?

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Theories are formulated using scientific method.Observations and data are gathered to test the problem.Tentative explanations,also called hypotheses,are then formulated to explain the observations and data.More tests are done and the data are analyzed.If the data show that the hypothesis is not correct,it is tossed out.If the data support the hypothesis,there are no significant data refuting it,and it is accepted by scientists,it becomes a theory.

Plates of ____________________ move over the ____________________,partly as a result of ____________________ cells.

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lithosphere,asthenosphere,convection

The ocean crust is composed mostly of what?

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C

Sudden or catastrophic events,such as volcanic eruptions and tsunami,can be explained by

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The material in Earth's inner core is ____________________,while the outer core is ____________________.

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Natural selection refers to survival of organisms that are best adapted to their environment.

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What are the characteristics of the Jovian planets?

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Briefly explain the importance of the Principle of Uniformitarianism to the study of historical geology.

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What is scientific method?

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What is the sequence of steps in the formation of sedimentary rocks?

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A combination of related parts that interact in an organized fashion is a(n)____________________.

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Among the evidence for the Big Bang origin of the universe is

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What about Earth makes it suitable for a wide variety of life?

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What is greenhouse effect and how does it work? What happens when greenhouse gas levels in the atmosphere increase?

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What distinguishes science from other forms of human inquiry?

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Briefly explain how geologists can formulate theories about events that occurred on Earth before humans were here to make observations.

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Natural selection refers to organisms choosing the habitat in which they feel most comfortable.

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The solar nebula theory of the formation of the solar system accounts for the differences in composition between the terrestrial and Jovian planets.

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Which of the following statements about a scientific theory is not true?

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What are the three major groups of rocks?

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