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15 Cards in this Set
- Front
- Back
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What is the process of scientific method?
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1. Observation
2. Hypothesis 3. Experiment 4. Theory 5. Build Models |
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Explain the scientific method.
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A procedure for discovering how the universe works through systematic observations and experiments.
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Explain the term hypothesis.
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A tentative explanation based on observational data and experiments
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What happens when a hypothesis is confirmed?
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After being presented to scientists to be criticized and repeatedly tested, it gains credibility especially if it explains new data or predicts outcomes to new experiments.
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What is a theory?
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A coherent set of hypotheses that explain some set of nature. Good theories are supported by substantial sets of data that have survived repeated challenges.
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Explain topography.
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The general configuration of varying heights that gives shape to Earth's surface, which is measured with respect to sea level
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What is the principle of Uniformatarianism?
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The processes we see now are the same as the were and will always be the same:
"geologic processes we see in action on Earth today have worked in much the same way throughout the geologic past". |
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What is geology?
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Discovering the layered earth
"Like an onion" |
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What is a geologic record?
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The information preserved in rocks; the information can be preserved to understand the Earth's history
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What are the different measurements of the Earth's layers?
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Crust: 40 km thick
Mantle: 40- 2890 km Liquid iron core: 2890- 5150 km Solid iron core |
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Who was the first to accurately calculate the circumference of the Earth?
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Eratosthenes, a Greek Librarian after a traveler had observed the shadows cast by the sun at different locations at noon.
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Explain the shape of the earth at its poles and at the equator.
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Earth is almost spherical, but bulges at the equator and is slightly squashed at the poles because of its rotation.
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What are the two types of meteoroids?
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- stony: similar composition to Earth's silicate mantle
- iron/nickle: similar composition to Earth's core |
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How did scientists conclude that earth is constructed of a mix of materials?
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Because when meteoroids hit Earth, they realized that they consisted of both heavier and lighter material, which explained why earth was so heavy with such light materials in the crust.
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What is the Nebular Hypothesis?
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Regards the formation of the Solar System
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