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11 Cards in this Set
- Front
- Back
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Define Earth Science.
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Earth Science is the study of all processes and events that affect the appearance and forms of the natural surface of the earth.
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Concepts: - Law of Uniformitarianism
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This law states that the physical laws and processes that operate on the earth today worked in the same way in the past.
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Concepts: - Gaia Hypothesis
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Recent idea (1972). Suggests that the biosphere is like a living organism and that the biological world (living oranisms) have influenced the physical environment and vice versa.
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Continents
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Cratons formed the main parts of the continents. Rocks aare cooled, become thinker and denser, sink into the asthenosphere, lay on the surface and then cratons are formed.
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Concepts: - System #2 - Cascading Systems.
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The focus for cascading systems is the actual movement or flow of energy or matter and the changes of state that often occur. Inputs and outputs of energy or matter are important in studying these systems.
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Concepts: - System #1 - Morphological Systems
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Morphology deals with the structure, appearance, and form of things. The focus on morphological systems is on the item, landform, pattern, or shape that results from physical processes operating on earth.
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Concepts: - Geologic Time
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Many scientists presently believe that the earth is between 4.5 and 5 billion years old.
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Concepts: - System #3 - Altered Systems.
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Altered systems focus on how morphological, cascading, or ecosystems have been changed by the unplanned intervention of humans.
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The atmosphere
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The earth's mantle and crust melted, causing volcanic eruptions, elements and compounds were released as gases, thus the atmosphere fromed.
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Oceans
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When the eatrth's crust was cooled between 0-100C water vapour in the atmospher condensed, rain formed, rain collected in lover lying basins and therefor formed oceans.
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Concepts: - System #4 - Ecosystems.
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An ecosystem is a special type of system in which plant and animal life respond to and influence the components of the physical world, such as climate, soil, and releif.
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