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33 Cards in this Set
- Front
- Back
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earth science
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the study of the earth and of the universe around it.
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career focus
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a special feature that appears in every unit of the book.
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geology
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the study of the origin, history, and structure of the solid earth and the shape it is
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oceanography
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the study of the earths oceans
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meteorology
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the study of earths atmosphere
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astronomy
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the study of the universe beyond earth.
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Pioneer, Voyager, Galileo, and Ulysses
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space probes that have provided useful data
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geosphere
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the solid earth
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hydrosphere
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water
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atmosphere
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the gases surrounding the earth
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ecology
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the study of the complex relationships between living things and their environment.
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ecosystem
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a community of organisms and the environmentthe inhabit.
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biosphere
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the largest ecosystem; includes all life on earth
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photosynthesis
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process in which plants in the rain forest use sunlight to produce food.
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pollution
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the contamination of the environment with waste products or impurities.
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biodegradable
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can be broken down by microorganisms
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scientific methods
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organized, logical approaches to scientific research
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observation
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act of using the senses to gather information
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measurement
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comparison of a property of an object or phenomenon with a standard unit
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hypothesis
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a possible explanation or solution to the problem.
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experimentation
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a scientific procedure carried out accordin to certain guidelines.
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variable
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a factor that might prove or disprove the hypothesis.
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controlled experiment
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an experiment set up to test a variable
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theory
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a hypothesis or a set of hypotheses that is supported by the results of experimentation and observation.
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scientific law
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a rule that correctly describes a natural phenomenon
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spectrum
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band of various colors of light
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wavelength
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the distance from he crest of one wave to the crest of the next
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elements
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substance that cannot be broken down into a simpler form by ordinary chemical means
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bright-line spectrum
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series of colored lines
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Doppler effect
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the apparent shift in the wavelengths of energy emitted by an energy source moving away from or toward an observer.
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spectroscope
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instrument that splits white light into a band of colors.
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big bang
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theory that describes the beginning of the universe.
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background radiation
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low levels of energy evenly distributed troughout the universe.
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